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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.56  No.2 (2015)  >  pp.249-252

MATERIALS TRANSACTIONS
<<Previous article Vol.56  No.2 (2015)   pp.249 - 252 Next article>>

Work Softening Behavior of Zirconium-Aluminum-Nickel-Copper Bulk-Metallic-Glass by Rolling

Toshio Nasu1), Shiori Kanazawa1), Sayaka Hayashizaki1), Shangxun Zhao1), Sadayuki Takahashi1), Takeshi Usuki2), Yasuo Kameda2)
1) Faculty of Education, Art and Science, Yamagata University 2) Faculty of Science, Yamagata University

Recently, “work softening behaviors” of bulk metallic glass (BMG) by shot peening was found. The purpose of this research is to investigate the work softening behavior of BMG by rolling at room temperature. The Vickers hardness of Zr55Al10Ni5Cu30 BMG decreased by first rolling, and then the hardness recovered slightly by second rolling. The density change of the BMG was measured before and after rolling. The density of the Zr55Al10Ni5Cu30 BMG increased slightly by first rolling. However, the density of the BMG decreased by second rolling. X-ray diffraction measurement was done for the BMG before and after rolling to certify the structure evolution occurred by rolling. Intensity of halo-pattern decreased slightly and a small peak appeared by rolling at room temperature.


Keyword:
bulk metallic glass, rolling, plastic deformation, micro Vickers hardness, work softening behavior, density change, structure change, X-ray diffraction

Received: September 29, 2014
Accepted: November 11, 2014 , Published online: January 25, 2015

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