Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting

Kai Feng; Chengcheng Zhang; Hiroyuki Kokawa; Zhuguo Li; Paul K. Chu

Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting

Kai Feng^*
, Chengcheng Zhang
, Hiroyuki Kokawa
, Zhuguo Li
, Paul K. Chu

^*Corresponding author for this work

Research output: Conference Papers › RGC 32 - Refereed conference paper (without host publication) › peer-review

Abstract

CrCoNi medium-entropy alloy has excellent cryogenic mechanical properties approaching the best on record. In this work, equiatomic CrCoNi medium-entropy alloy produced by selective laser melting has an epitaxially grown hierarchical and anisotropic microstructure with preserved single face-centered cubic phase. The tensile strength and ductility increase with decreasing temperature, reaching 1,340 MPa and 47% at 77 K, respectively, which are comparable to those of the deformed and recrystallized ones. Domination of dimples at fracture surface indicates that CrCoNi has good ductility at cryogenic temperature and CrCoNi medium-entropy alloy has good printability in selective laser melting and desirable mechanical properties.

Original language	English
Publication status	Published - Dec 2019
Event	15th International Conference on Plasma Based Ion Implantation & Deposition (PBII&D 2019) - Sheraton Shenzhen Nanshan, Shenzhen, China Duration: 19 Dec 2019 → 22 Dec 2019 http://pbiid2019.csp.escience.cn/dct/page/1 http://ddl.escience.cn/f/UBPy

Conference

Conference	15th International Conference on Plasma Based Ion Implantation & Deposition (PBII&D 2019)
Abbreviated title	PBII&D 2019
Place	China
City	Shenzhen
Period	19/12/19 → 22/12/19
Internet address	http://pbiid2019.csp.escience.cn/dct/page/1 http://ddl.escience.cn/f/UBPy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Medium entropy alloys
CrCoNi
Selective laser melting
Mechanical properties
Cryogenics

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@conference{fc6b71bca0f248fdb94de14519a2ada7,

title = "Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting",

abstract = "CrCoNi medium-entropy alloy has excellent cryogenic mechanical properties approaching the best on record. In this work, equiatomic CrCoNi medium-entropy alloy produced by selective laser melting has an epitaxially grown hierarchical and anisotropic microstructure with preserved single face-centered cubic phase. The tensile strength and ductility increase with decreasing temperature, reaching 1,340 MPa and 47\% at 77 K, respectively, which are comparable to those of the deformed and recrystallized ones. Domination of dimples at fracture surface indicates that CrCoNi has good ductility at cryogenic temperature and CrCoNi medium-entropy alloy has good printability in selective laser melting and desirable mechanical properties.",

keywords = "Medium entropy alloys, CrCoNi, Selective laser melting, Mechanical properties, Cryogenics",

author = "Kai Feng and Chengcheng Zhang and Hiroyuki Kokawa and Zhuguo Li and Chu, \{Paul K.\}",

year = "2019",

month = dec,

language = "English",

note = "15th International Conference on Plasma Based Ion Implantation \& Deposition (PBII\&D 2019), PBII\&D 2019 ; Conference date: 19-12-2019 Through 22-12-2019",

url = "http://pbiid2019.csp.escience.cn/dct/page/1, http://ddl.escience.cn/f/UBPy",

}

Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting. / Feng, Kai; Zhang, Chengcheng; Kokawa, Hiroyuki et al.
2019. Paper presented at 15th International Conference on Plasma Based Ion Implantation & Deposition (PBII&D 2019), Shenzhen, China.

Research output: Conference Papers › RGC 32 - Refereed conference paper (without host publication) › peer-review

TY - CONF

T1 - Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting

AU - Feng, Kai

AU - Zhang, Chengcheng

AU - Kokawa, Hiroyuki

AU - Li, Zhuguo

AU - Chu, Paul K.

PY - 2019/12

Y1 - 2019/12

N2 - CrCoNi medium-entropy alloy has excellent cryogenic mechanical properties approaching the best on record. In this work, equiatomic CrCoNi medium-entropy alloy produced by selective laser melting has an epitaxially grown hierarchical and anisotropic microstructure with preserved single face-centered cubic phase. The tensile strength and ductility increase with decreasing temperature, reaching 1,340 MPa and 47% at 77 K, respectively, which are comparable to those of the deformed and recrystallized ones. Domination of dimples at fracture surface indicates that CrCoNi has good ductility at cryogenic temperature and CrCoNi medium-entropy alloy has good printability in selective laser melting and desirable mechanical properties.

AB - CrCoNi medium-entropy alloy has excellent cryogenic mechanical properties approaching the best on record. In this work, equiatomic CrCoNi medium-entropy alloy produced by selective laser melting has an epitaxially grown hierarchical and anisotropic microstructure with preserved single face-centered cubic phase. The tensile strength and ductility increase with decreasing temperature, reaching 1,340 MPa and 47% at 77 K, respectively, which are comparable to those of the deformed and recrystallized ones. Domination of dimples at fracture surface indicates that CrCoNi has good ductility at cryogenic temperature and CrCoNi medium-entropy alloy has good printability in selective laser melting and desirable mechanical properties.

KW - Medium entropy alloys

KW - CrCoNi

KW - Selective laser melting

KW - Mechanical properties

KW - Cryogenics

M3 - RGC 32 - Refereed conference paper (without host publication)

T2 - 15th International Conference on Plasma Based Ion Implantation & Deposition (PBII&D 2019)

Y2 - 19 December 2019 through 22 December 2019

ER -

Microstructure and mechanical properties of CrCoNi medium-entropy alloy fabricated by selective laser melting

Abstract

Conference

UN SDGs

Research Keywords

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