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Interfacial phenomena during ultrasonic welding of ultra-low-carbon steel and pure Ti
Scripta Materialia ( IF 6 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.scriptamat.2019.11.037
Jhe-Yu Lin , Shoichi Nambu , Toshihiko Koseki

Abstract Changes in bonding strength and interfacial formation during the ultrasonic welding (USW) of steel and Ti were investigated. It was found that when the temperature of the joint was increased above 600 °C during USW, the bonding strength increased drastically and resulted in base-metal fracture. Interfacial, fracture, compositional, and crystallographical analyses revealed that phase transformation in Ti from α (hexagonal close-packed: HCP) to β (body-centered cubic: BCC) led to improved deformability at elevated temperatures, which promotes extensive bonding formation through the elimination of gaps near the bonding interface. Through this process, joints with good bonding and strength can be obtained.

中文翻译:

超低碳钢与纯钛超声焊接时的界面现象

摘要 研究了钢和钛的超声焊接 (USW) 过程中结合强度和界面形成的变化。结果表明,在 USW 期间,当接头温度升高到 600 °C 以上时,结合强度急剧增加并导致母材断裂。界面、断裂、成分和晶体学分析表明,Ti 从 α(六方密排:HCP)到 β(体心立方:BCC)的相变导致高温下的变形能力提高,从而促进了广泛的键合形成。消除接合界面附近的间隙。通过这个过程,可以获得具有良好结合力和强度的接头。
更新日期:2020-03-01
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