Microstructure Evolution,Tribological and Corrosion Properties of Amorphous Alloy Strengthening Stainless Steel Fabricated by Selective Laser Melting in NaCl Solution

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外文摘要：As a type of austenitic stainless steel,316L stainless steel has excellent plasticity,corrosion resistance,and biocompatibil-ity,making it widely used in industries,especially in the marine environments.However,its lower yield strength and wear resistance are the obvious disadvantages that restrict its application in more fields.In this work,an Fe-based amorphous alloy(Feam)was selected as reinforcement to enhance the 316L stainless steel prepared by selective laser melting(SLM),and microstructure evolution,mechanical properties,tribological and corrosion performance of the SLMed samples were investigated in detail.The relative density values of both 316L stainless steel and Feam-reinforced samples are above 99％,which suggests that Feam-reinforced samples also have outstanding formability.In the as-etched micrograph,all of the SLMed samples exhibit cellular structure.Feam-reinforced samples have thicker sub-grain boundaries,and retained amorphous phase can be observed in the samples reinforced with 10 wt％and 15 wt％Feam.As the addition of Feam increases,the microhard-ness and compression strength of the Feam-reinforced samples gradually improve and reach 449.2 HV and 2181.9 MPa,respectively.The wear morphologies show that the 316L stainless steel and Feam-reinforced samples both experience abrasive wear and corrosion wear in a 3.5 wt％NaCl solution.Meanwhile,as the amount of Feam added increases,the coefficient of friction and wear rate of SLMed samples gradually decrease.Compared to the unreinforced sample,Feam-reinforced samples have lower corrosion current density and higher pitting potential according to the potentiodynamic polarization curves and also exhibit superior corrosion resistance in the salt spray environment.This work suggests that the addition of Fe-based amorphous alloy can improve the mechanical properties and wear resistance of 316L stainless steel,as well as its ability to withstand salt spray corrosion.

外文关键词：

Selective laser melting316L stainless steelAmorphous alloyTribologyCorrosion

作者：

Pengwei Jiang、Gang Wang、Yaosha Wu、Zhigang Zheng、Zhaoguo Qiu、Tongchun Kuang、Jibo Huang、Dechang Zeng

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作者单位：

School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China

Zhongshan R&D Center for Materials Surface and Thin Films Technology of the South China University of Technology,Gent Materials Surface Technology(Guangdong)Co.,Ltd.,Zhongshan 528437,China

Yangjiang Branch,Guangdong Laboratory Materials Science and Technology Yangjiang Advanced Alloys Laboratory,Yangjiang 529599,China

Zhongshan Torch Polytechnic,Zhongshan 528436,China

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基金：

Guangdong Science and Technology ProgramZhongshan Municipal Science and Technology ProgramGuangdong Provincial Department of Education ProgramGuangdong Provincial Department of Education ProgramGuangdong Provincial Department of Education ProgramGuangdong Provincial Department of Education ProgramGuangdong Provincial Department of Education ProgramGuangdong Education Planning Program

项目编号：

2023A05050501452021B20172019KZDZX10532022ZDZX30852023ZDZX30942023ZDZX30992023KCXTD0832020GXJK554

出版年：

2024

DOI：

10.1007/s40195-024-01665-5

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(5)

参考文献量49