Influence of heat treatment on microstructure,mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

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外文摘要：Magnesium(Mg)alloys are considered to be a new generation of revolutionary medical metals.Laser-beam powder bed fusion(PBF-LB)is suitable for fabricating metal implants with personalized and complicated structures.However,the as-built part usually exhibits undesirable microstructure and unsatisfactory performance.In this work,WE43 parts were firstly fabricated by PBF-LB and then subjected to heat treatment.Although a high densification rate of 99.91％was achieved using suitable processes,the as-built parts exhibited anisotropic and layered microstructure with heterogeneously precipitated Nd-rich intermetallic.After heat treatment,fine and nano-scaled Mg24Y5 particles were precipitated.Meanwhile,the α-Mg grains underwent recrystallization and turned coarsened slightly,which effectively weakened the texture intensity and reduced the anisotropy.As a consequence,the yield strength and ultimate tensile strength were significantly improved to(250.2±3.5)MPa and(312±3.7)MPa,respectively,while the elongation was still maintained at a high level of 15.2％.Furthermore,the homogenized microstructure reduced the tendency of localized corrosion and favored the development of uniform passivation film.Thus,the degradation rate of WE43 parts was decreased by an order of magnitude.Besides,in-vitro cell experiments proved their favorable biocompatibility.

外文关键词：

laser-beam powder bed fusionWE43 alloysheat treatmentmechanical performancebiodegradation behavior

作者：

Chenrong Ling、Qiang Li、Zhe Zhang、Youwen Yang、Wenhao Zhou、Wenlong Chen、Zhi Dong、Chunrong Pan、Cijun Shuai

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作者单位：

College of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,People's Republic of China

School of Mechanical and Electronic Engineering,Suzhou University,Suzhou 234000,People's Republic of China

Shaanxi Key Laboratory of Biomedical Metal Materials,Northwest Institute for Non-ferrous Metal Research,Xi'an 710016,People's Republic of China

Department of Orthopedics,First Affiliated Hospital of Gannan Medical College,Ganzhou 341000,People's Republic of China

School of Mechanical and Automotive Engineering,South China university of technology,Guangzhou 510641,People's Republic of China

State Key Laboratory of High-Performance Complex Manufacturing,Central South University,Changsha 410083,People's Republic of China

Double Medical Technology Inc.,Xiamen 361026,People's Republic of China

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基金：

国家自然科学基金国家自然科学基金Jiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects江西省自然科学基金江西省自然科学基金Scientific Research Project of Anhui Universities

项目编号：

519350145216504320225BCJ2300820224ACB20401320224ACB214008KJ2021A1106

出版年：

2024

DOI：

10.1088/2631-7990/acfad5

极端制造(英文)

CSTPCDEI

ISSN：

年,卷(期)：2024.6(1)