温度对马氏体和铁素体晶格常数影响规律  

Influence of temperature on lattice constants of martensite and ferrite

作　　者：齐海东 王晶 陈中军[2] 吴忠华[2] 宋西平[1] Qi Hai-Dong;Wang Jing;Chen Zhong-Jun;Wu Zhong-Hua;Song Xi-Ping(State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China;Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]中国科学院高能物理研究所,北京同步辐射装置,北京100049 [3]中国核动力研究设计院,成都610213

出　　处：《物理学报》2022年第9期366-373,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:21171018,51271021);新金属国家重点实验室基金(批准号:2019-ZD06,2021Z-18)资助的课题。

摘　　要：采用同步辐射技术研究了温度对马氏体和铁素体晶格常数的影响规律.研究结果表明,马氏体和铁素体的晶格常数均随着温度的升高而逐渐增大,但马氏体的衍射峰有分峰现象,而铁素体的衍射峰没有分峰现象.对马氏体的{110}和{200}衍射峰进行分峰处理,得到马氏体晶格常数a和c随温度升高逐渐增大,但晶格常数a的增大速度要大于c的速度,即马氏体的正方度逐渐降低.当温度升至500℃时,马氏体正方度c/a=1.铁素体的晶格常数随温度的变化规律与马氏体晶格常数a的基本相同,而与马氏体晶格常数c的明显不同,表明了温度对马氏体晶格常数的影响本质.除此以外,通过对同步辐射数据的分析,建立了马氏体和铁素体晶格常数随温度变化的数值方程.The effect of temperature on the lattice constants of martensite and ferrite are studied by the synchrotron radiation technique.The results show that the lattice constants of martensite and ferrite increase gradually with the increase of temperature,but diffraction peaks of martensite show a peak splitting phenomenon,while the diffraction peaks of ferrite do not.From the fitting of the{110}and{200}diffraction peaks of martensite,it is found that the lattice constants a and c of martensite gradually increase with the temperature rising,but the increasing rate of lattice constant a is faster than that of c,that is,the squareness of martensite gradually decreases.When the temperature increases to 500℃.the squareness(c/a)of martensite is equal to 1.The variation of lattice constant of ferrite with temperature is basically the same as that of lattice constant a of martensite,but different from that of lattice constant c of martensite,showing the nature influence of temperature on the lattice constants of martensite.Besides,based on the analysis of synchrotron radiation data,the quantitative equations of lattice constants of martensite and ferrite varying with temperature are established.

关 键 词：温度 马氏体 铁素体 晶格常数 

分 类 号：TG142.1[一般工业技术—材料科学与工程]