奥氏体相晶粒取向对TRIP双相不锈钢Fe-19.3Cr-2Ni-2.7Mn-2Si循环马氏体相变的影响  

Effect of austenite grain orientation on martensitic transformation of TRIP duplex stainless steel Fe-19.3Cr-2Ni-2.7Mn-2Si under cyclic loading

作　　者：邹宗园[1] 刘冠男 王宏中 陈雷[3] 金淼[1] ZOU Zong-yuan;LIU Guan-nan;WANG Hong-zhong;CHEN Lei;JIN Miao(Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education,Yanshan University,Qinghuangdao 066004,China;NORINCO Jiangshan Heavy Industries Research Institute Co.,Ltd.,Xiangyang 441000,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004 [2]中国兵器集团江山重工研究院有限公司,湖北襄阳441000 [3]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《塑性工程学报》2022年第10期91-97,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51905467,52075474);河北省自然科学基金资助项目(E2020203104)。

摘　　要：以Mn-N合金化TRIP双相不锈钢为研究对象,进行了对称应变控制的循环加载试验及电子背散射衍射微观组织观测试验。在利用INSTRON 8801试验机进行循环加载试验的同时,采用FMP30铁素体测量仪对应变幅为0.9%、1.1%和1.3%时不同循环周次下的马氏体转变量进行了测量,分析了循环马氏体相变规律,建立了预测循环马氏体转变量随循环周次变化的相变动力学模型。结果表明,随着循环周次的增加,试验钢马氏体相变速率先逐渐增大,达到峰值后逐渐降低;应变幅越大,循环初期马氏体相变速率越大,且越早达到峰值。进行了应变幅为1.1%的循环加载条件下准原位微观组织观测试验,通过EBSD测试手段探索了循环加载条件下奥氏体晶粒取向对马氏体相变的影响,得到了不同晶粒取向的奥氏体晶粒转变为马氏体从易到难依次为<101>、<001>和<111>。Taking MN-N alloyed TRIP duplex stainless steel as the research object,the cyclic loading tests controlled by symmetrical strain and microstructure observation tests by electron backscattering diffraction(EBSD)were conducted.While INSTRON 8801 testing machine was used for cyclic loading tests,the transformation of martensite was measured by FMP30 ferritic admeasuring apparatus at different cycle times with the strain amplitudes of 0.9%,1.1%and 1.3%.The cyclic transformation law of martensite was analyzed,and the dynamic model was established to predict the variation cyclic transformation amount of martensite with cycle times.The results show that with the increase of cycle times,the transformation rate of martensite of test steel increases gradually,and then decreases gradually after reaching the peak value.The greater the strain amplitude is,the greater the transformation rate of martensite at the beginning of cycle is,and the earlier the peak value occurs.The quasi in-situ microstructure observation tests with the strain amplitude of 1.1%under cyclic loading condition were carried out.The effect of austenite grain orientation on martensitic transformation under cyclic loading condition was explored by EBSD test.It is obtained that the transition of austenite with different grain orientations to martensite from easy to difficult is<101>,<001>and<111>.

关 键 词：TRIP双相不锈钢 循环加载 马氏体相变 相变动力学模型 晶粒取向 

分 类 号：TG142.1[一般工业技术—材料科学与工程]