Resistance spot welding of Ti₄₀Zr₂₅Ni₃Cu₁₂Be₂₀ bulk metallic glass: experiments and finite element modeling

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• 作者：Gang Wang ; Yong-Jiang Huang ; Deodat Makhanlall ; Jun Shen
• 关键词：Metallic glasses ; Simulations ; Resistance spot welding ; Cooling rate
• 刊名：Rare Metals
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：36
• 期：2
• 页码：123-128
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials; Nanotechnology; Ceramics, Glass, Composites, Natural Materials; Surfaces and Interfaces, Thin Films; Inorganic Chemistry; Physical Chemistry;
• 出版者：Nonferrous Metals Society of China
• ISSN：1867-7185
• 卷排序：36

文摘

The use of resistance spot welding (RSW) technology for joining Ti₄₀Zr₂₅Ni₃Cu₁₂Be₂₀ metallic glass was investigated. The microstructure obtained from the welded BMG sample was studied. Joint without precipitates was prepared with welding current of 5.0 kA for 2 cycles. A fully coupled thermal–electrical–mechanical finite element model (FEM) was developed to complement the experimental study. The simulated results agree well with the measurements. The effects of key process parameters such as welding current and welding time on the evolvement and microstructure of the weldment were determined and discussed. Moreover, the critical cooling rate for preserving the amorphous state in the weld fusion zone is determined to be approximately 1 × 103 K·s−1.