From soft to ultrahard over 1000 HV: Engineering the hardness of FeMnAl (Cu) medium entropy alloys by unlocking the potential of β-Mn precipitation

被引：1

作者：

Zuo, Yang ^{[1
]}

Fu, Yu ^{[1
]}

Xiong, Renlong ^{[2
]}

Sun, Lixin ^{[1
]}

Peng, Huabei ^{[1
]}

Wang, Hui ^{[3
]}

Wen, Yuhua ^{[1
]}

Kim, Hyoung Seop ^{[4
,5
,6
]}

机构：

[1] Sichuan Univ, Sch Mech Engn, Chengdu 610065, Peoples R China

[2] Wuhan Inst Technol, Sch Mech & Elect Engn, Hubei Prov Key Lab Chem Equipment Intensificat & I, Wuhan 430205, Peoples R China

[3] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China

[4] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous & Eco Mat Technol, Pohang 37673, South Korea

[5] Yonsei Univ, Inst Convergence Res & Educ Adv Technol, Seoul 03722, South Korea

[6] Tohoku Univ, Adv Inst Mat Res WPI AIMR, Sendai 9808577, Japan

来源：

ACTA MATERIALIA | 2024年 / 278卷

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

Medium entropy alloys; Hardness; Aging treatment; beta-Mn; Wear resistance; MECHANICAL-PROPERTIES; LOW-DENSITY; AL ADDITION; MICROSTRUCTURE; BEHAVIOR; STEELS; EVOLUTION;

D O I：

10.1016/j.actamat.2024.120235

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultra-hard and wear-resistant metallic alloys are crucial for engineering applications to withstand prolonged wear and tear. However, fabricating multiple component alloys with varying hardness levels poses challenges in compositional design, processing optimization, and the application of hardening techniques across different alloy systems. Here, we demonstrate a facile approach for fabricating ultrahard FeMnAl(Cu) low-density medium entropy alloys (MEAs) with flexible hardness by inducing the precipitation of beta-Mn via a routine aging process. This method enables a broad range of tunable hardness, from relatively soft (210 HV) to ultrahard (1042 HV), by controlling the precipitation of beta-Mn in FeMnAl(Cu) low-density MEAs within a few hours of aging. The rapid aging-induced hardening response endowed these FeMnAl(Cu) MEAs with exceptional resistance to wear damage. These findings pave a new way for developing ultrahard and wear-resistant metallic alloys, which eliminates the complex and costly composition design and thermalmechanical processing routes typically required to harden conventional steels and alloys.

引用

页数：13