Tailoring strength and ductility of high-entropy CrMnFeCoNi alloy by adding Al

• 作者: Xin Xian Zhi-Hong Zhong Li-Jing Lin Zhi-Xiong Zhu Chang Chen Yu-Cheng Wu
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（3）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1015-1021
• 页数: 7页
• 语种: 英文

摘要

High-entropy alloys with high strength and acceptable ductility at both room and elevated temperatures for high-temperature structural applications are desired.In this paper,CrMnFeCoNi alloy with outstanding ductility but low strength was selected as baseline alloy to study the formation of hard phase to strengthen this ductile alloy by adding Al into it.The results indicate that there is a phase structure transition from fcc to bcc when adding enough Al into CrMnFeCoNi.The yield strength and hardness increase with the content of Al increasing,due to the for-mation of hard bcc phase in the ductile CrMnFeCoNi alloy.The CrMnFeCoNiAl alloy with a bcc structure shows a high yield strength and adequate ductility at elevated temperatures.At 400 and 500℃,the yield strength and ductility of CrMnFeCoNiAl alloy are 975.59 MPa and 6.39％and 989.48 MPa and 9.15％,respectively.An example of tailoring the strength and ductility of high-en-tropy alloy is demonstrated in this paper.