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| Effect of Sintering Temperature on Microstructure and Mechanical Properties of TiZrVMo Alloy Used for Internal Combustion Engine |
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Received:October 28, 2020
Revised:November 17, 2020
Accepted:November 18, 2020
Published Online:January 21, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.02.014 |
| KeyWord:high melting point alloy; spark plasma sintering; microstructure; mechanical property |
| Author | Institution |
| YANG Chang-zheng |
河南交通职业技术学院 |
| ZHANG Zheng-hua |
河南交通职业技术学院 |
| ZENG Qing-yi |
华电郑州机械设计研究院有限公司 |
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| Abstract: |
| TiZrVMo alloy was prepared by electric spark plasma sintering (SPS), and samples with different mechanical properties and microstructure were obtained by controlling different sintering temperatures. The results show that two crystal structures including BCC and FCC are formed in alloy matrix after sintering, and diffraction peak of BCC is higher than that of FCC. Upen increase of sintering temperature, grain size rises and plasticity rises first and drops later. The sample sintered at 1 100 ℃ has compressive yield strength of 1 501.4 MPa and plastic strain of 31.4%. With increase of sintering temperature, yield strength drops first and rises later, and plastic strain rises first and drops later. When sintering temperature rises, alloy material gradually changes from quasi-brittle fracture to microporous aggregate fracture, and then forms large size grain and occurs intergranular fracture, which shows characteristics of brittle cleavage fracture. |
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