Phase transformations in reduced-activation duplex alloy Fe52Mn30Cr18 under isothermal heat treatment
Phase transformations in reduced-activation duplex alloy Fe52Mn30Cr18 under isothermal heat treatment
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等温热处理下减活化双相合金 Fe52Mn30Cr18 的相变
DOI：
10.1016/j.fusengdes.2019.111249
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发表时间：
2019-10
影响因子：
1.7
通讯作者：
Huang Qunying
中科院分区：
文献类型：
--
作者：
Cao Weitao;Xin Jingping;Ding Wenyi;Wang Chao;Zheng Mingjie;Huang Qunying
还原活化Fe-Mn-Cr合金被认为是先进核系统的候选结构材料。合金在高温下的相稳定性是其应用的关键。本文研究了新型还原活化双相合金Fe 52 Mn 30 Cr 18在等温热处理过程中的一系列相变。合金经550°C热处理3 h后，铁素体相转变为χ相。χ相和原始铁素体相之间存在立方对立方的取向关系，晶格常数比为3：1。当温度高于800 °C时，由于Cr原子的扩散，χ相共析分解为奥氏体和具有片层结构的σ相。根据晶体结构和磁性的演变，认为从铁素体到χ相的转变是相邻晶胞中原子重排的结果，同时伴随着合金铁磁性的消失。显微硬度测试结果表明，χ相的形成可能是高Cr Fe基合金中温脆化的原因之一。
Reduced-activation Fe-Mn-Cr alloys have been regarded as the candidate structural materials for advanced nuclear systems. The phase stability of one alloy at high temperature is critically required for its application. In this work, a series of phase transformations in a new type reduced-activation duplex alloy Fe52Mn30Cr18under isothermal heat treatment were investigated. The ferrite phase in the alloy converted to χ phase after the alloy treated at 550°C for 3 h. The cube-on-cube orientation relationship was found between χ phase and the original ferrite phase with the lattice constant ratio of 3:1. The χ phase was eutectoid decomposed into austenite and σ phases with lamellar structures due to the diffusion of Cr atoms at temperatures above 800 °C. According to the evolution of the crystal structure and magnetic properties, the transformation from ferrite to χ phase was considered as atomic rearrangement in the adjacent unit cells, accompanied by the disappearance of ferromagnetism in the alloy. The microhardness results indicated that the χ phase formation could be one of the potential reasons for the intermediate temperature embrittlement in the high Cr Fe-based alloys.
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DOI：
10.1007/bf02652289
发表时间：
1994-06
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
W. S. Spear;D. H. Polonis
通讯作者：
W. S. Spear;D. H. Polonis
固溶相多主元合金设计的快速筛选方法
影响因子：
8.4
作者：
Zheng Mingjie;Ding Wenyi;Cao Weitao;Hu Shenyang;Huang Qunying
通讯作者：
Huang Qunying
DOI：
10.1146/annurev.ms.03.080173.001551
发表时间：
1973-08
期刊：
Annual Review of Materials Science
影响因子：
--
作者：
G. Meyrick;G. W. Powell
通讯作者：
G. Meyrick;G. W. Powell
DOI：
10.1007/bf02666327
发表时间：
1993-09
期刊：
Metallurgical Transactions A
影响因子：
--
作者：
Byeong-Joo Lee
通讯作者：
Byeong-Joo Lee
影响因子：
1.7
作者：
M. Eissa;S. El-Kameesy;S. El-fiki;S. Ghali;R. M. E. Shazly;A. Saeed
通讯作者：
M. Eissa;S. El-Kameesy;S. El-fiki;S. Ghali;R. M. E. Shazly;A. Saeed