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Improving the Fatigue Property of Metallic Glass by Tailoring the Microstructure to Suppress Shear Band Formation

42 Pages Posted: 26 Feb 2019 First Look: Accepted

See all articles by X. D. Wang

X. D. Wang

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division; Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences

R. T. Qu

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division

S. J. Wu

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division

Z. Zhu

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science

H. F. Zhang

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science; Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences

Zhefeng Zhang

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division; Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences; University of Science and Technology of China (USTC) - School of Materials Science and Engineering

Abstract

Metallic glass (MG) usually exhibits poor fatigue property, limiting its application as structural materials. Shear bands play a key role in fatigue crack initiation and propagation of MG. In this work, to enhance the fatigue property of MG, we proposed and verified a new strategy of suppressing the shear band initiation and then impeding the fatigue crack formation through relaxing the microstructure, in contrast to the previous one of proliferating shear bands through toughening MG. Moreover, simple quasi-static tests including uniaxial tension, compression and notch tension, are employed as feedback to estimate the best microstructure after relaxing and then the optimal fatigue property of MG. It is found that if the relaxed samples exhibit higher compressive elastic limit and tensile strength, but only slightly decreased notch toughness than the as-cast samples, the fatigue property of relaxed samples can be obviously enhanced. The present strategy provides a promising way for enhancing the fatigue endurance property of MGs without the requirement of intrinsically large plasticity, which may thus be beneficial for the structural application of most MGs with high glass forming ability.

Keywords: Metallic glass, Fatigue property, Annealing, Shear band

Suggested Citation

Wang, X. D. and Qu, R. T. and Wu, S. J. and Zhu, Z. and Zhang, H. F. and Zhang, Zhefeng, Improving the Fatigue Property of Metallic Glass by Tailoring the Microstructure to Suppress Shear Band Formation (February 26, 2019). Available at SSRN: https://ssrn.com/abstract=3339841

X. D. Wang (Contact Author)

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences

Building 7, NO. 80 Zhongguancun Road
Beijing, Beijing 100190
China

R. T. Qu

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

S. J. Wu

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Z. Zhu

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

H. F. Zhang

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences

Building 7, NO. 80 Zhongguancun Road
Beijing, Beijing 100190
China

Zhefeng Zhang

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division ( email )

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences ( email )

Building 7, NO. 80 Zhongguancun Road
Beijing, Beijing 100190
China

University of Science and Technology of China (USTC) - School of Materials Science and Engineering

96 Jinzhai Road
Hefei, Anhui 230026
China

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