Enhancement on mechanical properties of CoCrNi medium entropy alloy via cold spray additive manufacturing associated with sintering

被引：11

作者：

Zhang, Yongyun ^{[1
,2
]}

Qin, Bailiang ^{[1
]}

Chan, KangCheung ^{[1
]}

Lupoi, Rocco ^{[2
]}

Yin, Shuo ^{[2
]}

Xie, Yingchun ^{[3
]}

Ye, Shulong ^{[4
]}

Yu, Peng ^{[5
]}

Ke, Haibo ^{[6
]}

Wang, Weihua ^{[6
,7
]}

机构：

[1] Hong Kong Polytech Univ, Dept Ind & Syst Engn, State Key Lab Ultraprecis Machining Technol, Hong Kong, Peoples R China

[2] Univ Dublin, Trinity Coll Dublin, Dept Mech & Mfg Engn, Parsons Bldg, Dublin 2, Ireland

[3] Guangdong Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510651, Peoples R China

[4] Shenzhen MSU BIT Univ, Fac Mat Sci, Shenzhen 518172, Peoples R China

[5] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

[6] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China

[7] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF MANUFACTURING PROCESSES | 2023年 / 94卷

基金：

中国国家自然科学基金;

关键词：

CoCrNi medium entropy alloy; Cold spraying additive manufacturing; Sintering strategies; Microstructures evolution; Properties improvement; DEFORMATION MECHANISMS; OXIDATION BEHAVIOR; HEAT-TREATMENT; MICROSTRUCTURE; RECRYSTALLIZATION; DEPOSITION; ANISOTROPY; EVOLUTION; IMPACT;

D O I：

10.1016/j.jmapro.2023.03.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Equimolar CoCrNi medium entropy alloy (MEA) has a broad potential for industrial applications due to its excellent strength-ductility synergy. In this study, the emerging solid-state cold spray additive manufacturing (CSAM) approach was applied to fabricate bulk CoCrNi MEA deposits for the first time. However, due to its nature, CSAM normally results in limited metallurgical bonding and weak interfacial bonding between deformed particles, particularly for high-strength alloys such as the CoCrNi MEA used in this work. Therefore, a post -sintering treatment with temperatures ranging from 1200 degrees C to 1350 degrees C was applied after CSAM to improve the interparticle bonding and strengthen the as-fabricated MEA deposits. During the sintering process, recovery, recrystallization, sintering necks and grain migration for polycrystalline growth were observed at different stages. The sintering treatment significantly enhanced the tensile strength and ductility of the as-fabricated sample from-240 MPa and-2 % to-660 MPa and 43 %. This study validates the potential of the united CSAM-sintering strategy in additive manufacturing of CoCrNi MEA.

引用

页码：413 / 423

页数：11