Study on collective friction and wear behavior of W-Ni-Fe alloy balls. (December 2021)

• Record Type: Journal Article
• Authors: Pang, Lilong; Tai, Pengfei; Shen, Tielong; Wang, Zhiguang; Zhu, Shengyu; Cui, Minghuan; Chang, Hailong; Zhang, Hongpeng; Ma, Zhiwei; Mu, Zongxin; Yao, Cunfeng
• Is Part Of: Tribology international. Volume 164(2021)
• Publication Date: 2021-12
• Subjects: Collective friction and wear -- Tungsten alloy ball -- Fatigue wear -- High temperature; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2021.107232
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Tungsten alloy balls are considered as one of the important candidate spallation targets for China initiative Accelerator Driven Subcritical System. The wear of these balls in the spallation target loop greatly affects their service life. In this work, the collective friction and wear of the balls at 250 °C were studied by using our self-developed equipment. The results reveal that the mass loss ratio of balls first rises and then falls, experiencing different stages, and its maximum is about 0.32 wt%. For each stage balls have their own unique wear characteristics. In the end a new layer with a structure of amorphous surrounding nanocrystallines is formed on the ball surface. The role of wear debris in the all process is discussed. Graphical Abstract: ga1 Highlights: There are six different stages during the process of collective friction and wear of W-Ni-Fe alloy balls. The worn balls at different stages have their own unique wear characteristics. A new layer with a structure of amorphous surrounding nanocrystals on the surfaces of balls is formed. The formation mechanism of the new layer is ascribed as micro-area sintering of nano-wear debris.