Oxide dispersion strengthening in CrCoNi medium entropy alloy built by selective laser melting with oxygen-rich powder

被引：7

作者：

Han, Bolun ^{[1
,2
]}

Feng, Kai ^{[1
,2
]}

Li, Zhuguo ^{[1
,2
]}

Wang, Zhiyuan ^{[1
,2
]}

Yu, Yiwei ^{[1
,2
]}

Du, Shangzhe ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[2] Collaborat Innovat Ctr Adv Ship & Deep Sea Explora, Shanghai 200240, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 973卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Selective laser melting; Powder quality; Oxide dispersion strengthening; Medium entropy alloy; GRAIN-ORIENTATION; STAINLESS-STEEL; DEFORMATION; MICROSTRUCTURE; MECHANISMS; STRESS; SIZE;

D O I：

10.1016/j.jallcom.2023.172798

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In laser-based additive manufacturing for metallic materials, the high standard for alloy powder quality significantly increases cost, energy, and time consumption, which hinders further practical applications. In this study, we focus on the influence of oxygen impurity of the powder feedstock for the additive manufacturing approach of selective laser melting, using equimolar CrCoNi medium entropy alloy (MEA) as an example. We synthesized both pristine CrCoNi powder and its oxygen-rich counterpart (MEAO). We thoroughly characterized the microstructural evolution during tensile loading using a series of characterization methods, including XRD, SEM, EBSD, and TEM. The results revealed a well-preserved deformation mechanism of nano-twinning, along with elevated strength achieved by the oxide dispersion strengthening in the LPBF-built MEAO sample. This research demonstrates the potential for cost reduction in the powder fabricating process for additive manufacturing.

引用

页数：11

共 47 条

[31] On the mechanical response and microstructure evolution of NiCoCr single crystalline medium entropy alloys [J].