Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion

Sun，Haotian1; Luo，Zairan2; Wang，Shuai2; Hashimoto，Naoyuki3; Oka，Hiroshi3; Liu，Qian2; Isobe，Shigehito3

2023-09-15

10.1016/j.matlet.2023.134644

Materials Letters   影响因子和分区

0167-577X

1873-4979

This study investigated the influence of microstructure on the strengthening mechanism in CoCrNi medium entropy alloys (MEAs) fabricated by laser powder-bed fusion (L-PBF). An excellent combination of high strength and elongation was achieved in L-PBFed CoCrNi MEA. The yield strength of L-PBFed CoCrNi MEA was significantly improved because of the combined effect of grain boundary strengthening and dislocation strengthening. Due to the temperature gradient difference during L-PBF process, the crescent shape grain boundaries were evident in L-PBFed samples, which increased the mechanical properties.

Grain boundary Laser powder-bed fusion Medium entropy alloy Strengthening

SCI ; EI

英语

其他

Science, Technology and Innovation Commission of Shenzhen Municipality[GJHZ20200731095213039];Japan Society for the Promotion of Science[JP21H00136];

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:001012941800001

ELSEVIER

20232314195570

Chromium alloys ; Cobalt alloys ; Economic and social effects ; Entropy ; High-entropy alloys ; More electric aircraft

Metallurgy and Metallography:531 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Aircraft, General:652.1 ; Social Sciences:971

MATERIALS SCIENCE

2-s2.0-85161003876

Scopus

1.Graduate School of Engineering,Hokkaido University,Sapporo,060-8628,Japan
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Faculty of Engineering,Hokkaido University,Sapporo,060-8628,Japan

Sun，Haotian,Luo，Zairan,Wang，Shuai,et al. Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion[J]. Materials Letters,2023,347.

Sun，Haotian.,Luo，Zairan.,Wang，Shuai.,Hashimoto，Naoyuki.,Oka，Hiroshi.,...&Isobe，Shigehito.(2023).Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion.Materials Letters,347.

Sun，Haotian,et al."Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion".Materials Letters 347(2023).