拉伸速率对Mar-M247镍基高温合金高温强度的影响  

Effect of Tensile Rate on High Temperature Strength of Mar-M247 Nickel Base Superalloy

作　　者：张波[1] 龙老虎 周斌[1] 高骥天 ZHANG Bo;LONG Laohu;ZHOU Bin;GAO Jitian(State Key Laboratory of Long-life High-temperature Materials,Materials Research Center of Dongfang Steam Turbine Co.,Ltd.,Deyang 618000,China)

机构地区：[1]东方汽轮机有限公司材料研究中心长寿命高温材料国家重点实验室,德阳618000

出　　处：《理化检验（物理分册）》2020年第4期6-9,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用不同的拉伸速率测试了900℃下Mar-M247镍基高温合金的拉伸强度,研究了高温条件下拉伸速率对高温合金材料强度的影响。结果表明:恒定试验速率下,较高的速率使得Mar-M247镍基高温合金的规定塑性延伸强度和抗拉强度更高。横梁位移速率不同时,Mar-M247镍基高温合金的高温抗拉强度随拉伸速率的增加而增大。高温拉伸时在屈服强度以后阶段是否需要加速或者在什么时候加速所得到的结果更为准确,还缺乏理论和实践的支撑,需要开展大量的试验研究工作。The tensile strength of MAR-M247 nickel base superalloy at 900℃was tested by different tensile rates,the effect of tensile rate on the strength of superalloy was studied.The results show that the specified plastic extension strength and tensile strength of MAR-M247 nickel base superalloy were higher with higher rate under constant test rate.The high temperature tensile strength of MAR-M247 nickel base superalloy increased with the increased of tensile rate when the displacement rate of crossbeam was different.Whether or when acceleration is needed in the later stage of yield strength,the test results are more accurate,which is still lack of theoretical and practical support,and a lot of test research work needs to be carry out.

关 键 词：Mar-M247镍基高温合金 拉伸速率 高温拉伸 抗拉强度 屈服强度 

分 类 号：TG115[金属学及工艺—物理冶金]