GB/T 34556-2017 in English
VALIDImpact test method for aluminium matrix composites
- Issued on:2017-10-14
- Implemented on:2018-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 34556-2017铝基复合材料冲击试验方法》由TC572（全国碳纤维标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of the standard for impact test methods for aluminum-based composite materials
| Dimensions | GB/T 34556—2017 | Comparative analysis |
|---|---|---|
| Scope of the standard | Applicable to impact tests of particle and whisker reinforced aluminum-based composite materials. | Compared with GB/T 229 Charpy pendulum impact test method for metal materials, it is more targeted. |
| Key terms | Aluminum-based composite materials, impact absorption energy, impact toughness. | Clear definitions, in line with international standards. |
| Test equipment requirements | Pendulum impact tester specified in GB/T21189 or JJG145. d | Equipment accuracy directly affects the accuracy of the test results. |
Professional terms and practical application case analysis
Aluminum Matrix Composites: Refers to adding reinforcing phases such as particles or whiskers to pure aluminum or aluminum alloys. Its advantage is that it has higher strength and rigidity than pure aluminum and is widely used in aerospace and other fields.
Impact Toughness αK: An indicator to measure the ability of a material to resist a single impact load. The calculation formula is αK = K / (w * h), where K is the impact absorption energy, and w and h are the width and height of the specimen respectively.
For example, in the manufacture of certain aviation parts, the impact test of the U-notch specimen was carried out according to the GB/T 34556 standard. The result showed that the αK value of the material reached 120 kJ/m², indicating that it has good impact resistance.
Test equipment and technical requirements
| Project | Specific requirements | Precautions |
|---|---|---|
| Impact testing machine | Comply with GB/T21189 or JJG145 standards. | Calibrate regularly to ensure that the radius of the pendulum blade is 2mm. |
| Vernier caliper | The minimum graduation value does not exceed 0.02mm. | It is used to accurately measure the size of the specimen to avoid overheating or cold work hardening affecting the results. |
Test procedure and data processing
The key steps of the impact test include specimen preparation, equipment calibration, temperature control and data recording. According to the standard requirements, the number of specimens in each group shall not be less than 5, and the arithmetic mean, standard deviation and coefficient of dispersion shall be calculated to ensure the reliability and consistency of the data.
Implementation suggestions
- Equipment calibration:Regularly check the zero return error and anvil span of the testing machine to ensure that they are within the allowable range.
- Operator training:Master the methods of specimen preparation, equipment use and data processing to avoid human errors.
- Environmental control: Keep the test temperature stable and conduct the test within the specified temperature range of ±2℃ or the default range of 23±5℃.
- Record management: Record the sample information, test conditions and result analysis in detail to facilitate traceability and quality assessment.
Background of standard formulation and technological evolution
The formulation of GB/T 34556—2017 is based on the extensive application needs of aluminum-based composite materials in aerospace, automobile manufacturing and other fields. With the advancement of materials science, the standard introduces more precise specimen size tolerances and impact test methods, replacing the traditional Charpy pendulum test to meet the testing requirements of high-performance composite materials.
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