Transactions of Materials and Heat Treatment

Title：Heat exposure property of burn-resistant titanium alloy WSTi3515S

Authors： Ma Fanjiao Lai Yunjin Xin Shewei Wang Xiaoliang Zhang Pingxiang Wang Biao Zhong Yan

Unit： Western Superconducting Technologies Co. Ltd. Northwest Institute for Nonferrous Metal Research China Gas Turbine Establishment

KeyWords： titanium alloy WSTi3515S burn-resistant titanium alloy heat exposure property thermal stability high temperature tensile properties

ClassificationCode：TG146.2+3

year,vol(issue):pagenumber：2017,42(5):147-151

Abstract：

The tensile properties of alloy WSTi3515S slab samples were tested at room temperature and 100 ℃ after 550 ℃/100 h/AC heat exposure test. The tensile properties were tested at different temperatures from room temperature to 550 ℃ without heat exposure test. The results show that by the precipitation strengthening effect, the tensile strength of sample after heat exposure is slightly improved, but the plasticity is obviously decreased. However, the tensile strength at 100 ℃ is lower than that at room temperature, and the plasticity is higher. But it is still lower than the sample without heat exposure test. Furthermore, during heat exposure test, the second phase precipitated at grain boundary is the key feature of alloy WSTi3515S. It is also the reason for the decrease of the thermal stability of alloy WSTi3515S. Under improving the test temperature, the strength of the smooth tensile specimen decreases and the plasticity increases first and then decreases, while the strength of the notched tensile specimen decreases continually, the plasticity does not change obviously, and the elastic modulus decreases continually.

Funds：

陕西省科技统筹创新工程计划（2016KTCQ01-100）；陕西省科技统筹创新工程计划（2016KTCQ01-81）

马凡蛟（1985-），男，硕士，工程师

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