Effects of raw powder characteristics on microstructure and mechanical properties of W20Cu composites manufactured by SLM

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-12-03 DOI:10.1016/j.ijrmhm.2024.107001

Jie Mao , Wentan Zhu , Nan Ye , Zichun Wu , Jiancheng Tang , Haiou Zhuo , G.A. Bagliuk

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引用次数: 0

Abstract

Selective laser melting (SLM) technique is a promising method to achieve near-net-shaping of WCu complex components. In this work, two types of raw powers were prepared, including spherical WCu composite powder and mixed WCu powder. Effect of the raw powder characteristics on the microstructure and mechanical properties of W20Cu alloy were investigated. The results show that the composite powder enables the WCu composites to possess a high relative density (95.1 %), homogeneous microstructure and super mechanical properties (204.40 ± 1.73 HBW for hardness and 500 MPa for tensile strength). Remarkably, compared to mixed powder, the tensile strength and hardness are increased by 37 % and 74.2 %, respectively. This good effect stems from the composite powder with good sphericity degree and uniform structure. As a result, a dense specimen with refined W particles (3.05 μm) evenly embedded in the Cu matrix phase, accompanied by dislocation structure and sub-grains within the Cu matrix are obtained, contributing to the superior mechanical properties of the composites. The present work offers a strategy for developing high-performance WCu composites using SLM technology.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.