Effect of W addition on the glass forming ability and mechanical properties of Fe-based metallic glass

JOURNAL OF ALLOYS AND COMPOUNDS

卷:731

Article

Liang, Dan-dan¹  Wei, Xian-shun¹  Chang, Chun-tao^2,3  Li, Jia-wei^2,3  Wang, Xin-min^2,3  Shen, Jun¹ 

[1] Tongji Univ, Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China

[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Zhejiang, Peoples R China

关键词: Metallic glasses;    W addition;    Glass forming ability;    Microhardness;    Compressive strength;   

DOI  :  10.1016/j.jallcom.2017.10.104

来源: Elsevier

【 摘 要 】

The effects of refractory element W addition on the glass forming ability (GFA) and mechanical properties of Fe47-xCr20Mo10WxC15B6Y2 (x = 0, 2, 4, 6 at. %) alloys were investigated. The supercooled liquid region Delta T-x (T-x-T-g) and criterion gamma [T-x/(T-g + T-l)] of Fe47-xCr20Mo10WxC15B6Y2 alloys increased to 62 K and 0.390, respectively, when x increased to 4 at. %. An appropriate substitution of Fe by W (4 at. %) significantly improved the GFA by suppressing the formation of the Fe23B6 phase. The GFA and thermal stability decreased when x increased to 6 at. %. The Fe43Cr20Mo10W4C15B6Y2 bulk metallic glass (BMG) rod with an 8 mm diameter could be fabricated by using commercial purity materials. The addition of the refractory W element could also enhance the microhardness, compressive strength and plasticity of Fe47-xCr20Mo10WxC15B6Y2 BMGs. The Fe41Cr20Mo10W6C15B6Y2 BMG exhibited high compressive strength of 4.12 GPa and microhardness of 1267 HV. (C) 2017 Elsevier B.V. All rights reserved.

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