Effect of Room Temperature Ultrasonic Vibration Compression on the Microstructure Evolution and Mechanical Properties of AZ91 Alloy

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外文摘要：To investigate the potential of direct ultrasonic vibration on improving the performance of magnesium alloys,this study first employed the ultrasonic vibration compression(UVC)on the solid solution treated AZ91 alloy,and explored its microstruc-ture evolution and mechanical properties under UVC.Within only two seconds,the UVC alloys showed large deformation strains of 34.8-54.4％,and sudden increase of sample temperature to 243 ℃.Microstructure characterizations proved that UVC promoted the formation of abundant shear bands,fine grains,and the bimodal distribution of Mg17Al12 precipitates consisting of submicron particles located within the shear bands and nano-sized ones within the matrix.Owing to the unique microstructure,the micro-hardness(and nano-hardness)value of UVC alloy was increased by 37.7％(35％)when compared with the solution-treated alloy.Moreover,the nano-modulus of the developed AZ91 alloy was also significantly increased to 62 GPa by statistical nanoindentation tests,which could be ascribed to increased Mg17Al12 precipitates and decreased c/a value to some extent.In general,this work provides a new insight into the design and preparation of high-performance magnesium alloys by UVC at room temperature.

外文关键词：

AZ91 alloysUltrasonic vibration compressionPrecipitationShear bandsMechanical properties

作者：

Ziyue Xu、Huan Liu、Luyao Li、Chao Sun、Xi Tan、Baishan Chen、Qiangsheng Dong、Yuna Wu、Jinghua Jiang、Jiang Ma

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作者单位：

College of Materials Science and Engineering,Hohai University,Nanjing 210000,China

Suzhou Research Institute of Hohai University,Suzhou 215000,China

Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China

Institute of Medical Devices(Suzhou),Southeast University,Suzhou 215163,China

Institute for Advanced Study,Central South University,Changsha 410083,China

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology,Nanjing Institute of Technology,Nanjing 211167,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProject on Excellent Postgraduate Dissertation of Hohai UniversityPostgraduate Research & Practice Innovation Program of Jiangsu ProvinceKey Research and Development Program of Jiangsu ProvinceSuzhou Science and Technology ProjectSuzhou Science and Technology ProjectSuzhou Science and Technology ProjectNanjing Major Science and Technology Project

项目编号：

5227110151901068422003518SJCX23_0175BE2021027SYG202312SJC2023005SZS2023023202309015

出版年：

2024

DOI：

10.1007/s40195-024-01692-2

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(7)