激光选区熔化CoCrMo合金的组织研究及生物应用

doi:10.11896/cldb.23030026

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Abstract Selective laser melting (SLM) technology is a near-net-shaping method that can rapidly prepare complex structural parts. Due to its high degree of freedom in spatial manufacturing, it has a very broad application prospect in personalized medical treatment. This study focuses on the effect of laser energy density (E_v) on the microstructure and formability of CoCrMo alloy, and systematically explores SLM CoCrMo alloy in terms of density, microstructure and mechanical strength. The effect of E_v on the microstructure and defects of CoCrMo alloy was analyzed. The optimal parameters (laser power=165 W, scanning speed=1 050 mm/s) were obtained with low porosity (0.18%), fine grain structures (0.31 μm) and excellent mechanical properties (tensile strength=1 157 MPa, microhardness=421.53HV_0.1). Starting from the needs of patients for biological knee implants, the design method of a biological total knee implant with bone trabecular structure on the bone contact surface was explored, and in-situ knee replacement experiments in large animals were carried out. Postoperative imaging examination found that the 3D printed knee prosthesis can not only accurately replace the original diseased joint parts, but also promote the recovery of the original walking posture of the experimental dog as soon as possible, without dislocation and other complications. The successful implementation of this study provides a strong theoretical basis and data support for the clinical use of 3D printed biological total knee replacement.

Key words： selective laser melting CoCrMo alloy microstructure mechanical property biological application

Published: 10 September 2024 Online: 2024-09-30

CLC number:

TG146.1

Fund:Guangdong Academy of Sciences to Build Domestic First-class Research Institute Action Special Fund Project (2021GDASYL-20210102005, 2022GDASZH-2022010107, 2022GDASZH-2022010203-003), Special Support Project of Guangdong Province (2019BT02C629), Basic and Applied Basic Research Foundation of Guangdong Province (2020A1515111031, 2021A1515010939), China Association for Science and Technology ‘Young Talent Promotion Project' (YESS20210269), Guangzhou Science and Technology Plan Project (202007020008, 202102020327).

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	Articles by authors
	TAO Hongwei
	YU Ting
	CAO Mingxuan
	WU Zhongheng
	CAI Zhaobing
	LIU Min
	YAN Xingchen

Cite this article:

TAO Hongwei,YU Ting,CAO Mingxuan, et al. Microstructure Study and Biological Application of Laser Selective Melting CoCrMo Alloy[J]. Materials Reports, 2024, 38(17): 23030026-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23030026 OR http://www.mater-rep.com/EN/Y2024/V38/I17/23030026

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