退火温度对Fe-18Mn-3Si-3Al TWIP钢晶粒尺寸及晶界特征的影响  

Effects of Annealing Temperature on Grain Size and Grain Boundary Characteristics of Fe-18Mn-3Si-3Al TWIP Steel

作　　者：郭艳辉 徐春 宁胜利 GUO Yanhui;XU Chun;NING Shengli(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201418

出　　处：《热加工工艺》2023年第4期112-115,共4页Hot Working Technology

基　　金：上海市自然科学基金项目(15ZR1440500);东北大学轧制技术及连轧自动化国家重点实验室开放课题基金项目(2016007);上海应用技术大学特种轧制平台项目(2016xt018)。

摘　　要：采用EBSD分析方法研究了不同退火温度条件下Fe-18Mn-3Si-3Al TWIP钢的晶粒尺寸及晶界特征。结果表明,退火温度对晶粒尺寸影响明显。当退火温度低于1050℃时,晶粒分布比较均匀,晶粒尺寸集中在较小尺寸范围。而退火温度超过1050℃时,晶粒尺寸集中在15~35μm,尺寸跨度较大。随退火温度的升高,Σ3晶界和总的CSL晶界比例的变化趋势相同,呈现先缓慢增加后降低的趋势,并且均在退火温度为950℃时出现峰值。孪晶的形成与晶粒取向密切相关,多数孪晶更倾向于在具有<111>取向的晶粒中形成。The grain size and grain boundary characteristics of Fe-18Mn-3Si-3Al TWIP steel at different annealing temperatures were studied by EBSD method.The results show that,the effect of annealing temperature on grain size is obvious.When the annealing temperature is lower than 1050℃,the grain distribution is more uniform,and the grain size is concentrated in a smaller size range.However,when the annealing temperature exceeds 1050℃,the grain size is concentrated in 15-35μm,and the size span is large.With the increase of annealing temperature,the variation trend ofΣ3 grain boundary and total CSL grain boundary ratio is the same,which is first increasing then decreasing.The peak value is obtained at annealing temperature of 950℃.The formation of twins is closely related to grain orientation,and most twins tend to form in grains with<111>orientation.

关 键 词：TWIP钢 EBSD 退火温度 晶粒尺寸 晶界特征 

分 类 号：TG161[金属学及工艺—热处理]