摘要
某Gr.5钛合金板进行拉伸性能测试,发现其屈服强度及抗拉强度均满足ASTM B265-13要求,但断后伸长率明显低于标准要求。针对此问题,对Gr.5钛合金板的化学成分、显微硬度及微观组织形貌进行分析。发现该材料氢元素含量超标,使其表现出一定的氢脆,导致材料塑性降低。此外,该Gr.5钛合金板表面氧元素存在偏聚现象,可能是导致材料塑性降低的另一个原因。
The tensile properties of Gr. 5 titanium alloy plate were tested,and it was found that the yield strength and tensile strength met the requirements of ASTM B265—13,but the percentage elongation after fracture was significantly lower than the standard value. Aiming at this issue,Gr. 5 titanium alloy plate was analyzed from the aspects of chemical composition,microhardness and microstructure. The results indicate that the hydrogen content of the material exceeded the standard value,leading to the hydrogen embrittlement and plasticity reduction. The segregation phenomenon of oxygen element existing in the surface of Gr. 5 titanium alloy plate,was maybe another cause of plasticity reduction.
出处
《理化检验（物理分册）》
CAS
2016年第1期43-45,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
Gr.5钛合金板
断后伸长率
氢
氧
Gr.5 titanium alloy plate
percentage elongation after fracture
hydrogen
oxygen
