Fe51Mn30Cr19低活化双相多主元合金中χ相与M23C6碳化物在475 ℃回火过程中的析出行为

doi:10.13251/j.issn.0254-6051.2020.06.022

金属热处理 ›› 2020, Vol. 45 ›› Issue (6): 98-103.DOI: 10.13251/j.issn.0254-6051.2020.06.022

Fe₅₁Mn₃₀Cr₁₉低活化双相多主元合金中χ相与M₂₃C₆碳化物在475 ℃回火过程中的析出行为

曹伟涛^1,2,3, 郑明杰¹, 丁文艺¹, 王超¹, 信敬平¹

1. 中国科学院核能安全技术研究所中子输运理论与辐射安全重点是实验室, 安徽合肥 230031;
2.中国科学技术大学研究生院科学岛分院, 安徽合肥 230027;
3. 河南理工大学物理与电子信息学院, 河南焦作 454000

收稿日期:2019-12-19 出版日期:2020-06-25 发布日期:2020-09-02
通讯作者: 信敬平,副研究员,博士,E-mail: jingping.xin@fds.org.cn
作者简介:曹伟涛 (1977—),男,博士研究生,主要研究方向为抗辐照结构材料的设计与研发,E-mail: caowt@hpu.edu.cn。
基金资助:
国家自然科学基金(11675209);安徽省重点攻关计划面上项目(1704A0902021);合肥物质科学技术中心创新项目培育基金(2018CXFX011)

Precipitation behavior of χ phase and M₂₃C₆ carbide in low-activation duplex multi-principal element alloy Fe₅₁Mn₃₀Cr₁₉ during tempering at 475 ℃

Cao Weitao^1,2,3, Zheng Mingjie¹, Ding Wenyi¹, Wang Chao¹, Xin Jingping¹

1. Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei Anhui 230031, China;
2. University of Science and Technology of China, Science Island Branch of Graduate School, Hefei Anhui 230027, China;
3. School of Physics and Electronics Information Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China

Received:2019-12-19 Online:2020-06-25 Published:2020-09-02

摘要/Abstract

摘要： 通过XRD、SEM、EBSD和TEM等手段研究了低活化双相多主元合金Fe₅₁Mn₃₀Cr₁₉在475 ℃回火过程中χ相与M₂₃C₆的析出行为。结果表明,试验材料在回火过程中χ相与M₂₃C₆碳化物析出行为既有相似性又存在差异性。两种析出相的相似性是χ相与其基体铁素体相和M₂₃C₆与其基体奥氏体相都满足立方-立方位向关系,且析出相与基体晶格常数比值都十分接近3∶1。两种析出相在回火过程中差异性在于χ相首先以点状析出相形式于铁素体内部产生,析出过程不存在元素偏聚,而M₂₃C₆的析出总起始于铁素体/奥氏体界面,然后逐渐向铁素体区域扩展,析出过程存在明显的铬元素偏聚。根据两种析出相晶格结构并与其母相对比,分析了两种析出相的形成机理。通过对低活化双相多主元合金析出特征的分析,能够为析出相的控制与材料性能设计提供重要的参考依据。

关键词: 多主元合金, 低活化, χ相, M₂₃C₆碳化物, 位向关系

Abstract: The precipitation behavior of χ phase and M₂₃C₆ carbide in low-activation duplex phase multi-principal element alloy Fe₅₁Mn₃₀Cr₁₉after tempering at 475 ℃ were studied by means of XRD, SEM, EBSD and TEM. The result shows that, after tempering, the precipitation behavior of χ phase and M₂₃C₆ carbide in the test materials exists similarities as well as differences. The similarities of the two precipitates are both exhibited the same cubic-cubic orientation relationship with its matrix, and the ratio of lattice constant of the precipitates and matrix is very close to 3∶1. However, the differences of the two precipitates are that χ phase is first precipitated inside the ferrite in the form of a dot-like, and there is no element segregation in the precipitation process, but the M₂₃C₆ phase always begins to precipitate at the interface of ferrite/austenite, and then gradually to expand into the ferrite region, which has a significant segregation of chromium. Based on the lattice structure of the two precipitations and their relationship with their parent phase, the formation mechanism of the two precipitations is also analyzed. Through the analysis of these characteristics of low-activation duplex phase multi-principal element alloy, it can provide an important reference for the control of the precipitated phase and the design of material properties.

Key words: multi-principal element alloy, reduced-activation, χ phase, M₂₃C₆ carbide, orientation relationship

中图分类号:

TG142

曹伟涛, 郑明杰, 丁文艺, 王超, 信敬平. Fe₅₁Mn₃₀Cr₁₉低活化双相多主元合金中χ相与M₂₃C₆碳化物在475 ℃回火过程中的析出行为[J]. 金属热处理, 2020, 45(6): 98-103.

Cao Weitao, Zheng Mingjie, Ding Wenyi, Wang Chao, Xin Jingping. Precipitation behavior of χ phase and M₂₃C₆ carbide in low-activation duplex multi-principal element alloy Fe₅₁Mn₃₀Cr₁₉ during tempering at 475 ℃[J]. Heat Treatment of Metals, 2020, 45(6): 98-103.

参考文献

[1]Wu Y, Chen Z, Hu L, et al. Identification of safety gaps for fusion demonstration reactors[J]. Nature Energy, 2016, 1: 16154.
[2]Wu Y, Bai Y, Song Y, et al. Development strategy and conceptual design of China lead-based research reactor[J]. Annals of Nuclear Energy, 2016, 87(2): 511-516.
[3]Tan L, Katoh Y, Tavassoli A A F, et al. Recent status and improvement of reduced-activation ferritic-martensitic steels for high-temperature service[J]. Journal of Nuclear Materials, 2016, 479: 515-523.
[4]Huang Q. Status and improvement of CLAM for nuclear application[J]. Nuclear Fusion, 2017, 57(8): 086042.
[5]沈文兴, 陈海涛, 郎宇平, 等. 析出相对6Mo超级奥氏体不锈钢腐蚀性能的影响[J]. 金属热处理, 2018, 43(7): 115-120.
Shen Wenxing, Chen Haitao, Lang Yuping, et al. Effect of precipitated phase on corrosion property of SASS-6Mo[J]. Heat Treatment of Metals, 2018, 43(7): 115-120.
[6]王耘涛, 布茂东. 低镍和无镍奥氏体不锈钢的研究现状及进展[J]. 金属热处理, 2013, 38(1): 15-20.
Wang Yuntao, Bu Maodong, Present research and progress on low-nickel and nickel-free austenitic stainless steels[J]. Heat Treatment of Metals, 2013, 38(1): 15-20.
[7]Li J, Xu Y L, Xiao X S, et al. A new resource-saving, high manganese and nitrogen super duplex stainless steel 25Cr-2Ni-3Mo-xMn-N[J]. Materials Science and Engineering A, 2009, 527(1/2): 245-251.
[8]严旺生. 我国铬锰系不锈钢发展评述[J]. 中国锰业, 2006, 24(2): 4-6.
Yan Wangsheng. An analysis of Cr-Mn stainless steel in China[J]. China's Manganese Industry, 2006, 24(2): 4-6.
[9]Miracle D B, Senkov O N. A critical review of high entropy alloys and related concepts[J]. Acta Materialia, 2017, 122(Supplement C): 448-511.
[10]Ye Y F, Wang Q, Lu J, et al. High-entropy alloy: Challenges and prospects[J]. Materials Today, 2016, 19(6): 349-362.
[11]Li Z, Pradeep K G, Deng Y, et al. Metastable high-entropy dual-phase alloys overcome the strength-ductility trade-off[J]. Nature, 2016, 534(7606): 227-230.
[12]Raabe D, Tasan C C, Springer H, et al. From high-entropy alloys to high-entropy steels[J]. Steel Research International, 2015, 86(10): 1127-1138.
[13]Koutsoukis T, Redjaïmia A, Fourlaris G. Phase transformations and mechanical properties in heat treated superaustenitic stainless steels[J]. Materials Science and Engineering A, 2013, 561: 477-485.
[14]Xu Z, Ding Z, Dong L, et al. Characterization of M₂₃C₆ carbides precipitating at grain boundaries in 100Mn13 steel[J]. Metallurgical Materials Transactions A, 2016, 47(10): 4862-4868.
[15]Joubert J M, Phejar M. Crystal chemistry and Calphad modelling of the χ phase[J]. Progress in Materials Science, 2009, 54(7): 945-980.

Fe₅₁Mn₃₀Cr₁₉低活化双相多主元合金中χ相与M₂₃C₆碳化物在475 ℃回火过程中的析出行为

Precipitation behavior of χ phase and M₂₃C₆ carbide in low-activation duplex multi-principal element alloy Fe₅₁Mn₃₀Cr₁₉ during tempering at 475 ℃

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