Surface hardening of CrCoFeNi high-entropy alloys via Al laser alloying

Surface hardening of CrCoFeNi high-entropy alloys via Al laser alloying

Undeformed face-centred cubic (FCC) high-entropy alloys (HEAs) always possess excellent plasticity but low hardness. In this work, Al alloying on the surface of a CrCoFeNi FCC HEA is realized by laser alloying technique. An Al1.5CoCrFeNi body-centred cubic (BCC) HEA is in-situ generated on the surfa...

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Bibliographic Details
Main Authors: Shuyuan Gou, Shunchao Li, Hailei Hu, Youtong Fang, Jiabin Liu, Weiping Dong, Hongtao Wang
Format: Article
Language:English
Published: Taylor & Francis Group 2021-10-01
Series:Materials Research Letters
Subjects:
surface hardening
laser alloying
crcofeni
high-entropy alloy
Online Access:http://dx.doi.org/10.1080/21663831.2021.1968524
Description
Summary:Undeformed face-centred cubic (FCC) high-entropy alloys (HEAs) always possess excellent plasticity but low hardness. In this work, Al alloying on the surface of a CrCoFeNi FCC HEA is realized by laser alloying technique. An Al1.5CoCrFeNi body-centred cubic (BCC) HEA is in-situ generated on the surface of the FCC HEA. The well-bonding BCC HEA layer possesses a hardness as high as 536 HV. The hard surface results in a much lower wear rate of the Al-alloyed specimen than the pristine specimen. This study provides a simple strategy to harden the FCC HEAs by in-situ formation of BCC HEA through laser alloying.
ISSN:2166-3831

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