Datasets:

Summer12138
/

OmniMat1K-VLMEvalKit

index stringlengths 6 6	subset stringclasses 1 value	category_id int64 1 19	category stringclasses 19 values	id int64 1 28	question stringlengths 12 2.84k	answer stringlengths 7 10.3k	image stringlengths 7.99k 2.82M ⌀	image_path stringlengths 27 64 ⌀	image_url stringlengths 13 29 ⌀	multimodal bool 2 classes	source_type stringclasses 4 values	source_name stringlengths 4 161	source_location stringlengths 6 75	key_points stringlengths 283 1.43k	scoring_weights stringlengths 48 126
01_001	qa	1	Materials Science and Engineering	1	What is the effect of carbon and alloying elements on the heating transformation of steel?	When heating hypoeutectoid or hypereutectoid steel, the formation process of austenite (A) is the transformation of pearlite (P) into A, as well as the continuous transformation or dissolution of ferrite ($\alpha$-Fe) or secondary cementite into A. The effects of alloying elements on austenite formation and grain gro...	null	null	null	false	Book	简明金属材料与热处理	Question 2 on Page 9	[{"id": "point_1", "description": "Describes the fundamental heating transformation process, where austenite forms from pearlite, and the dissolution of either ferrite or secondary cementite, depending on the steel's carbon content (hypoeutectoid vs. hypereutectoid)."}, {"id": "point_2", "description": "Explains that a...	{"point_1": 0.2, "point_2": 0.25, "point_3": 0.25, "point_4": 0.3}
01_002	qa	1	Materials Science and Engineering	2	What is the relationship between the water entry depth of the mold (core) and water explosion?	The water entry depth refers to the depth at which the entire mold is submerged below the water surface. Proper water entry depth helps increase the penetration pressure of water into the mold and prevents sand blocks from flying out. The water entry depth is limited by the equipment. Although the volume of the wat...	null	null	null	false	Book	铸件清理及热处理问答	Question 18 on Page 57	[{"id": "point_1", "description": "Explains that a proper water entry depth has a positive effect on the water explosion process."}, {"id": "point_2", "description": "Specifies the mechanisms of the positive effect, which include increasing the penetration pressure of water into the mold and preventing sand blocks from...	{"point_1": 0.25, "point_2": 0.4, "point_3": 0.25, "point_4": 0.1}
01_003	qa	1	Materials Science and Engineering	3	Does Rapid Cooling Cause Cracking?	During quenching, does rapid cooling cause parts to crack? As previously described, when a red-hot steel part is immersed in cold water or even ice water, cracking does not occur at the moment of immersion. This is because, at the instant of immersion, the supercooled austenite is a ductile structure and cannot induce ...	null	null	null	false	Book	热处理150问	Question 22 on Page 37	[{"id": "point_1", "description": "Directly states that rapid cooling itself does not cause cracking in steel at the moment of quenching, because the initial supercooled austenite structure is ductile."}, {"id": "point_2", "description": "Explains that cracking (quenching cracking) is actually caused by the phase trans...	{"point_1": 0.25, "point_2": 0.35, "point_3": 0.2, "point_4": 0.2}
01_004	qa	1	Materials Science and Engineering	4	What is Autogenous Crack?	Quenched parts have a microstructure of martensite and retained austenite. This microstructure is unstable at room temperature and will continuously transform into other microstructures, with most of the transformations involving expansion, i.e., the martensitic transformation of retained austenite. Therefore, if quenc...	null	null	null	false	Book	热处理150问	Question 1 on Page 53	[{"id": "point_1", "description": "Defines autogenous cracking (also known as aging or overnight cracking) as the spontaneous cracking that occurs in quenched parts when they are left untreated at room temperature."}, {"id": "point_2", "description": "Explains the core mechanism: the unstable microstructure of quenched...	{"point_1": 0.2, "point_2": 0.35, "point_3": 0.2, "point_4": 0.25}
01_005	qa	1	Materials Science and Engineering	5	What are the installation forms of the vibration damping device in a water explosion tank?	Answer: The characteristics of water explosion vibration are high frequency and small amplitude. The impact force of water explosion is transmitted to the ground and nearby buildings. At a distance of 3m from the water explosion tank, the amplitude of the foundation is 0.02μm, and the vibration acceleration reaches $11...	iVBORw0KGgoAAAANSUhEUgAAAgsAAAD2CAIAAADXrlN3AACVsElEQVR4nO2ddzxV///A3/ZMFCojSmSF0iRF2ntISYtKdtOqlFIoRZSskiIpSoWGRBkNyh7Ze1x7c417f3+8f5/zON97r9sNxdV5/nXO+7ze7/M65557Xuc9Xq8XA5FIBBgYGBgYGGQwjrYCGBgYGBhjFMxCYGBgYGBQBrMQGBgYGBiUwSwEBgYGBgZlMAuBgYGBgUEZzEJgYGBgYFAGsxAYGBgYGJTBLAQGBgYGBmUwC4GBgYGBQRnMQmBgYGBgUAazEBgYGKNPX1+f...	01/images/01_QA_005_img.png	01_QA_005_img	true	Book	铸件清理及热处理问答	Question 38 on Page 84	[{"id": "point_1", "description": "Identifies the bottom vibration damping form, where springs are installed at the bottom of the tank. Key characteristics include a high center of gravity, difficulty in detecting and replacing damaged springs, and being gradually phased out."}, {"id": "point_2", "description": "Identi...	{"point_1": 0.35, "point_2": 0.25, "point_3": 0.4}
01_006	qa	1	Materials Science and Engineering	6	What Causes Surface Softening in Surface Hardening Quenching?	Generally, the surface hardness of carburized and induction hardened parts is lower than that of the sub-surface layer. The main reason is the presence of retained austenite in the surface layer. The surface layer of surface-hardened parts has residual compressive stress ($\sigma_{\text{R}}$), so it should be hard. The...	null	null	null	false	Book	热处理150问	Question 4 on Page 92	[{"id": "point_1", "description": "Identifies the presence of retained austenite in the surface layer as the main cause of surface softening in surface hardening quenching."}, {"id": "point_2", "description": "Mentions decarburization as another possible, though less common for precision parts, cause for the decrease i...	{"point_1": 0.4, "point_2": 0.2, "point_3": 0.2, "point_4": 0.2}
01_007	qa	1	Materials Science and Engineering	7	Why do black spots appear?	The small gray circular dots that appear on the fracture of tensile specimens are called dark spots. Dark spots occur in rolled steel when the grains become coarser and the reduction ratio is small. According to the research by the author of this article and Akasu①, dark spots are prominent in steel with a carbon conte...	iVBORw0KGgoAAAANSUhEUgAAAgYAAAEwCAIAAABDli7aAAEAAElEQVR4nOydeUAN3f/4z21ftS/a931fVCSVpMgekSRLnuyyFklSRCRKZE1CCIUkQioklTbRXlpUSvu+nN8f5+P85ntLEs9Tnmdef90598zMmZl7z3vOe6VACAEJCQkJCQkANKM9ABISEhKSsQIpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gcpEkhISEhI/gfdaA/g38CrV6+ampqI...	01/images/01_QA_007_img.png	01_QA_007_img	true	Book	热处理150问	Question 3 on Page 108	[{"id": "point_1", "description": "Defines black spots as small gray circular dots on the fracture of tensile specimens, characterized by a fine silk-like fracture texture that contrasts with the surrounding rough fracture."}, {"id": "point_2", "description": "Specifies the material conditions, stating that black spots...	{"point_1": 0.2, "point_2": 0.35, "point_3": 0.35, "point_4": 0.1}
01_008	qa	1	Materials Science and Engineering	8	How is the white layer formed?	When performing long-term gas nitriding or salt bath nitriding, a white layer formed on the outermost surface is called a white layer. The white layer is composed of $Fe_{2}N$ with a nitrogen content of more than 11%, which is very difficult to corrode with acid, hence the name. If a white layer exists, it can cause sp...	null	null	null	false	Book	热处理150问	Question 10 on Page 113	[{"id": "point_1", "description": "Identifies the formation process, which occurs during long-term gas nitriding or salt bath nitriding on the outermost surface of a material."}, {"id": "point_2", "description": "Specifies the composition of the white layer, which is primarily iron nitride ($Fe_{2}N$) with a high nitro...	{"point_1": 0.4, "point_2": 0.3, "point_3": 0.15, "point_4": 0.15}
01_009	qa	1	Materials Science and Engineering	9	Why is it necessary to perform hot cutting on risers?	Answer: Castings inherently have varying degrees of casting stress, and using water explosion for sand cleaning will further complicate the internal stress. If the water explosion temperature is not properly controlled and no stress relief measures are taken after water explosion, some medium carbon steel, alloy steel ...	null	null	null	false	Book	铸件清理及热处理问答	Question 10 on Page 329	[{"id": "point_1", "description": "To prevent large cracks, which can occur when cold gas cutting is performed on castings with high internal stress. This stress is inherent and can be aggravated by processes like water explosion sand cleaning."}, {"id": "point_2", "description": "To prevent the formation of microcrack...	{"point_1": 0.4, "point_2": 0.4, "point_3": 0.2}
01_010	qa	1	Materials Science and Engineering	10	What should be noted when gas cutting the risers of wheel-type castings?	Answer: Wheel-type castings have large hub risers and multiple rim risers. During gas cutting, the symmetrical method should be adopted to avoid sequential gas cutting, so as to facilitate the balanced distribution of heat. All risers should be cut continuously to reduce stress. During gas cutting, the cutting nozzle a...	null	null	null	false	Book	铸件清理及热处理问答	Question 17 on Page 335	[{"id": "point_1", "description": "A symmetrical and continuous cutting method should be adopted to ensure balanced heat distribution and reduce stress."}, {"id": "point_2", "description": "The cutting nozzle and cutting direction should form an angle of 30°~90° with the tangent of the rim to ensure cutting quality."},...	{"point_1": 0.3, "point_2": 0.25, "point_3": 0.2, "point_4": 0.25}
01_011	qa	1	Materials Science and Engineering	11	How to determine the casting repair process sequence?	The timing of the repair process should be determined based on the casting material, defect size, and repair method. (1) When repairing castings using metal spraying, putty filling, brazing, or epoxy resin bonding, the repair should be performed after heat treatment and chiseling/grinding. Otherwise, subsequent heat tr...	null	null	null	false	Book	铸件清理及热处理问答	Question 3 on Page 356	[{"id": "point_1", "description": "Mentions the general factors that determine the repair sequence, such as casting material, defect size, and repair method."}, {"id": "point_2", "description": "Explains that for non-welding methods like metal spraying, putty filling, or brazing, the repair should be performed after he...	{"point_1": 0.15, "point_2": 0.25, "point_3": 0.3, "point_4": 0.3}
01_012	qa	1	Materials Science and Engineering	12	What should be noted when correcting deformation during heat treatment?	Answer: The following points should be noted during operation: (1) The pressing iron must have sufficient weight, and the pressing position must be accurate. (2) Deformation correction shall be carried out during full annealing or normalizing; in individual cases, it can be performed before tempering and quenching. If ...	null	null	null	false	Book	铸件清理及热处理问答	Question 37 on Page 384	[{"id": "point_1", "description": "Specifies the requirements for the pressing iron, including having sufficient weight and being positioned accurately."}, {"id": "point_2", "description": "Identifies the appropriate timing for deformation correction, which should primarily be during full annealing or normalizing for b...	{"point_1": 0.2, "point_2": 0.35, "point_3": 0.25, "point_4": 0.2}
01_013	qa	1	Materials Science and Engineering	13	What should be noted in the process of quenching castings?	Answer: The key requirements for casting quenching are to obtain martensite (full hardening or full penetration) and avoid deformation and cracking. Therefore, the following aspects should be noted during quenching: (1) Before the casting is placed in the furnace, the molds and core sand should be cleaned up, the holes...	null	null	null	false	Book	铸件清理及热处理问答	Question 13 on Page 400	[{"id": "point_1", "description": "Control the cooling speed and select an appropriate quenching medium. The ideal process involves rapid cooling in the high-temperature transformation zone (e.g., 650-550°C for carbon steel) and slower cooling at lower temperatures to prevent cracking. The medium (e.g., water, oil) and...	{"point_1": 0.35, "point_2": 0.25, "point_3": 0.2, "point_4": 0.1, "point_5": 0.1}
01_014	qa	1	Materials Science and Engineering	14	What precautions should be taken during dip coating operation for castings?	Answer: The following precautions should be taken during dip coating operation for castings: (1) Size of the dip tank: The size of the dip tank depends on the workpiece dimensions. Under the premise of ensuring the workpiece is fully immersed, the tank volume and paint liquid surface area should be as small as possib...	null	null	null	false	Book	铸件清理及热处理问答	Question 15 on Page 459	[{"id": "point_1", "description": "Precautions regarding the dip tank size: it should be optimized (as small as possible while ensuring full workpiece immersion) to reduce thinner evaporation and simplify paint stirring."}, {"id": "point_2", "description": "Precautions for paint liquid control: adjust and maintain pain...	{"point_1": 0.25, "point_2": 0.4, "point_3": 0.35}
01_015	qa	1	Materials Science and Engineering	15	What are the causes of the segregation in castings?	Answer: There are three main types of segregation, each with distinct causes: (1) Dendritic segregation: Caused by the casting cooling much faster than under equilibrium conditions. It often occurs in alloys with a wide crystallization temperature range, such as tin bronze. In each grain, the harder-to-melt components...	null	null	null	false	Book	铸件清理及热处理问答	Question 32 on Page 515	[{"id": "point_1", "description": "Identifies dendritic segregation, which is caused by rapid cooling under non-equilibrium conditions, leading to compositional variations within individual grains due to the differential solidification of components with different melting points."}, {"id": "point_2", "description": "Id...	{"point_1": 0.34, "point_2": 0.33, "point_3": 0.33}

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OmniMatBench 1K Subset for VLMEvalKit

Scope notice: This repository contains OmniMat1K, a 1,000-item subset with 498 QA and 502 CAL records. It is not the complete 3,171-item OmniMatBench release described in the paper. Evaluation results produced from this repository must be labeled OmniMat1K and must not be presented as scores on the complete benchmark.

Release status

This repository contains the 1,000-item OmniMatBench subset prepared for VLMEvalKit. The repository is currently publicly accessible on Hugging Face.

The dataset owner, final public organization, license, and redistribution scope for source questions and images still need to be stated explicitly. Do not infer a public license from the OmniMat paper or the VLMEvalKit code.

Scope

1,000-item subset, equal to about 31.5% of the complete 3,171-item OmniMatBench release by item count.
498 QA records.
502 CAL records.
19 materials-science categories in each subset.
283 embedded image payloads.

The full benchmark reported in the paper contains 1,261 QA and 1,910 CAL items. OmniMat1K has a different QA/CAL composition, so its aggregate score is not directly comparable with the complete-benchmark score.

Files

vlmevalkit/OmniMat_QA.tsv: QA questions, answers, rubric key points, scoring weights, provenance fields, and embedded images.
vlmevalkit/OmniMat_CAL.tsv: calculation questions, final-answer formats and slots, provenance fields, and embedded images.

The files were generated with the official VLMEvalKit scripts/convert_omnimat.py converter from the local OmniMatBench1k_0817 source package.

2026-08-17 data update

CAL 03_017 and 16_017 no longer contain empty answer slots.
All 502 CAL records now satisfy the current structured-answer contract.
Several questions and scoring slots were revised so that every requested deliverable is represented by an answer slot.
Unscored plotting, sketching, and proof-only requirements were removed from affected calculation questions.
CAL task-type and adaptation metadata were normalized in affected records.
Image references were updated; the release now contains 283 verified image payloads.

Known data-quality notes

QA contains two duplicated question rows that require content-level review before a future major release.
QA 01_027 and 19_014 contain image references while their multimodal fields are false. Conversion follows the actual image references.
Source metadata still uses multiple capitalization and adaptation-field variants.

These notes do not prevent the current VLMEvalKit loader and scorer from processing the dataset, but they should remain visible to downstream users.

Local VLMEvalKit use

Download the two files into one local directory and point LMUData to it:

export LMUData=/path/to/LMUData

hf download Summer12138/OmniMat1K-VLMEvalKit \
  vlmevalkit/OmniMat_QA.tsv \
  vlmevalkit/OmniMat_CAL.tsv \
  --repo-type dataset \
  --local-dir /tmp/omnimat-download

cp /tmp/omnimat-download/vlmevalkit/OmniMat_*.tsv "$LMUData"/

Then run VLMEvalKit with its official dataset names:

python run.py --data OmniMat_QA OmniMat_CAL --model <MODEL_NAME>

OmniMat_QA and OmniMat_CAL are retained as compatibility names because they are the identifiers already used by the upstream VLMEvalKit integration. They load the OmniMat1K files in this repository; they do not imply that the complete 3,171-item benchmark is present.

The upstream OmniMat loader still requires either local TSV files or a separate patch that supplies these Hugging Face URLs.

Validation

The 2026-08-17 staging process verified:

1,000 converted rows and unique subset-scoped indices;
every converted question, answer, rubric, final-answer field, and provenance field against its source record;
all 283 embedded image payloads by direct byte comparison with source images;
498/498 valid QA rubric contracts;
502/502 valid CAL structured-answer contracts;
no parse error, missing required field, duplicate index, missing image, invalid image, or orphan image.

Attribution and license

Dataset owner: TO BE CONFIRMED

License: TO BE CONFIRMED BY THE DATA OWNER

The source records contain source_type, source_name, and source_location fields. These provenance fields do not themselves grant redistribution rights.

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