Laser powder bed fusion of compositionally graded CoCrMo-Inconel 718

被引：82

作者：

Wen, Yaojie ^{[1
]}

Zhang, Baicheng ^{[1
,2
]}

Narayan, Ramasubramanian Lakshmi ^{[3
]}

Wang, Pei ^{[4
]}

Song, Xu ^{[5
]}

Zhao, Hao ^{[6
]}

Ramamurty, Upadrasta ^{[4
,7
]}

Qu, Xuanhui ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Adv Mat & Technol Inst, Beijing 100083, Peoples R China

[2] Beijing Lab Metall Mat & Proc Modern Transportat, Beijing 100083, Peoples R China

[3] Indian Inst Technol Delhi, Dept Mat Sci & Engn, New Delhi 110016, India

[4] IMRE Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore

[5] Chinese Univ Hong Kong, Dept Mech & Automat Engn, Hong Kong, Peoples R China

[6] 3DPTek Co Ltd, Beijing, Peoples R China

[7] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore, Singapore

来源：

ADDITIVE MANUFACTURING | 2021年 / 40卷

基金：

中国国家自然科学基金;

关键词：

Continuous functionally graded alloy; Additive manufacturing; Laser powder bed fusion; Composition; Mechanical properties; MECHANICAL-PROPERTIES; BUILD DIRECTION; STAINLESS-STEEL; HEAT-TREATMENT; MICROSTRUCTURE; ALLOY; BEHAVIOR; EVOLUTION; TI-6AL-4V; CORROSION;

D O I：

10.1016/j.addma.2021.101926

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Manufacturing of compositionally graded alloys (CGAs) using powder bed based additive manufacturing (AM) techniques such as Laser powder bed fusion (LPBF) poses challenges in terms of achieving homogeneity in terms of mixing of the constituent alloys, their unintended segregation and formation of unwanted brittle phases. In this study, a novel method for LPBF of large-scale compositionally graded alloy components with continuous compositional variations across their length was devised and demonstrated by producing CoCrMo-Nickel based superalloy CGA coupons that are defect-free and with smooth end-to-end variations in the composition and microstructures. The variations in the tensile properties and hardness, measured using high throughput characterization techniques, were rationalized by recourse to the different phases present in the microstructures. The method has the potential to be extended to other material combinations for creating high quality CGA components.

引用

页数：10

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