金属热处理 ›› 2021, Vol. 46 ›› Issue (4): 1-8.DOI: 10.13251/j.issn.0254-6051.2021.04.001

• 材料研究 •    下一篇

FeMnCoCr系亚稳高熵合金的研究进展

高天宇1, 乔珺威1,2, 吴玉程2,3   

  1. 1.太原理工大学 材料科学与工程学院 高熵合金研究中心, 山西 太原 030024;
    2.太原理工大学 新材料界面科学与工程教育部重点实验室, 山西 太原 030024;
    3.合肥工业大学 有色金属材料及加工技术国家地方联合工程研究中心, 安徽 合肥 230009
  • 收稿日期:2021-02-24 出版日期:2021-04-25 发布日期:2021-05-08
  • 通讯作者: 乔珺威,教授,博士生导师,E-mail:qiaojunwei@gmail.com
  • 作者简介:高天宇(1996—),男,硕士研究生,主要研究方向为高熵合金的力学性能及变形机理,E-mail:gaotianyu01@hotmail.com
  • 基金资助:
    山西省自然科学基金(201901D111105,201901D111114);爆炸科学与技术国家重点实验室开放项目(KFJJ2013M)

Research progress of FeMnCoCr metastable high-entropy alloys

Gao Tianyu1, Qiao Junwei1,2, Wu Yucheng2,3   

  1. 1. Research Center for High-Entropy Alloys, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
    2. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
    3. National-Local Joint Engineering Research Center of Non-ferrous Metal Materials and Processing Technology, Hefei University of Technology, Hefei Anhui 230009, China
  • Received:2021-02-24 Online:2021-04-25 Published:2021-05-08

摘要: 高熵合金是一种原子排列有序,化学无序的新型多主元合金。通过改变合金元素的种类和浓度,能够调控合金系统层错能及显微组织的相稳定性,进而诱发形变孪晶、马氏体相变等塑性变形机制,最终使合金获得突出的综合力学性能。这种高熵合金的设计理念称为“亚稳工程”。亚稳高熵合金的显微组织、相结构及变形机制与合金体系的层错能密切相关。在FeMnCoCr系亚稳高熵合金中,随着系统层错能降低,面心立方结构稳定性下降,从而激活应变诱导马氏体相变(γ→ε),实现了合金强度和塑性的同时提高。本文主要介绍了FeMnCoCr系亚稳高熵合金的成分设计、制备及加工方法、微观结构和力学性能,并对亚稳高熵合金未来的研究方向进行了展望。

关键词: 高熵合金, 相变诱导塑性, 层错能, 力学性能

Abstract: High entropy alloy is a new type of atom-ordered and chemically disordered alloy with multi-principal elements, which can obtain outstanding comprehensive mechanical properties, because that by changing the type and concentration of alloying elements, the stacking fault energy and phase stability of alloys can be controlled, then inducing deformation twins, martensitic transformation and other plastic deformation mechanisms. The design concept of such high entropy alloys is called “metastable engineering”, and the microstructure, phase structures and deformation mechanisms of high entropy alloys are closely related to stacking fault energy of the alloy system. For the FeMnCoCr system, the phase stability of face-centered cubic structure decreases with the decreasing of stacking fault energy, and so the interface hardening and the transformation induced hardening (γ→ε) are introduced, improving the strength and plasticity of the alloy simultaneously. The composition design, preparation and processing method, microstructures and mechanical properties of the FeMnCoCr metastable high entropy alloys are reviewed here, and its future research direction is prospected.

Key words: high-entropy alloy, transformation induced plasticity, stacking fault energy, mechanical properties

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