保温时间对Ti_(2)AlNb基合金高温拉伸强度的影响  

Effect of holding time on Ti_(2)AlNb base alloy elevated temperature tensile strength

作　　者：李红军[1] 蔡静[1] LI Hongjun;CAI Jing(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016

出　　处：《物理测试》2021年第4期1-4,共4页Physics Examination and Testing

摘　　要：高温拉伸试验标准仅规定保温时间下限,对保温时间上限没有提及。以Ti_(2)AlNb基合金650℃高温拉伸试验为例,证明保温时间对拉伸强度结果有影响,提出对于这种高温拉伸试验过程出现保温时间效应的特殊材料,标准应明确规定各应变速率下的保温时间范围,保证不同检验部门试验结果的一致性和可对比性。The standard of elevated temperature tensile testing only stipulates the lower limit of the holding time,but does not mention the upper limit of holding time. Taking the elevated temperature tensile testing of Ti_(2)AlNb base alloy with 650 ℃ as an example,it is proved that the holding time has an effect on the tensile strength. For the special materials with holding time effect in the elevated temperrature tensile testing process,the standards should clearly specify the holding time range at a each strain rate,so as to ensure the consistency and comparability of the test results of different inspection departments.

关 键 词：保温时间效应 保温时间 应变速率 Ti_(2)AlNb基合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]