摘要
利用放电等离子烧结法(SPS)制备TA15钛合金试样,并采用扫描电子显微镜、自动转塔显微硬度计和电子万能试验机研究烧结温度对合金显微组织、硬度与力学性能的影响。结果表明,烧结温度对TA15钛合金微观组织具有显著影响,当烧结温度在900℃以上时,TA15钛合金由等轴组织转变为魏氏组织,且原始β相尺寸增大,魏氏组织中片层间距更加细密。在烧结温度850℃、烧结时间5 min、烧结压力40 MPa条件下,TA15钛合金具有最佳的力学性能,室温抗拉强度和屈服强度分别为1032.15、943.39 MPa,延伸率为17.72%。
TA15 titanium alloy specimen was prepared by spark plasma sintering(SPS),and the effects of sintering temperature on microstructure,hardness and mechanical properties of TA15 titanium alloy were studied by scanning electron microscope,automatic turret microhardness meter and electron universal testing machine.The results show that the microstructure of TA15 titanium alloy specimen is mainly determined by sintering temperature.When the sintering temperature is above 900℃,the microstructure changes from equiaxed structure to Widmanstatten structure,and the size of originalβphase obviously increases,while the lamellar spacing in Widmanstatten structure decreases.When the sintering temperature is 850℃,sintering time is 5 min,and sintering pressure is 40 MPa,TA15 titanium alloy has the best mechanical properties,with the tensile strength and yield strength of 1032.15,943.39 MPa,respectively,and the elongation is 17.72%.
作者
徐嘉
苏旭文
王海丽
孙国栋
Xu Jia;Su Xuwen;Wang Haili;Sun Guodong(School of Materials Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;Xi’an Rare Metal Materials Research Institute Co.,Ltd.,Xi’an 710016,China)
出处
《钛工业进展》
CAS
2022年第2期7-11,共5页
Titanium Industry Progress
基金
陕西省自然科学基金资助项目(2020JC-50)。
关键词
TA15钛合金
放电等离子烧结
显微组织
室温拉伸性能
TA15 titanium alloy
spark plasma sintering
microstructure
room temperature tensile properties
