Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (3): 415-424.DOI: 10.1007/s40195-019-00947-7

• Orginal Article • Previous Articles     Next Articles

Effect of Ni Interlayer on Cavitation Erosion Resistance of NiTi Cladding by Tungsten Inert Gas (TIG) Surfacing Process

Zhen-Ping Shi1,2, Zheng-Bin Wang1(), Ji-Qiang Wang1, Yan-Xin Qiao3(), Huai-Ning Chen1, Tian-Ying Xiong1, Yu-Gui Zheng1   

  1. 1 CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
    3 School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
  • Received:2019-04-17 Revised:2019-07-03 Online:2020-03-10 Published:2020-03-10
  • Contact: Wang Zheng-Bin,Qiao Yan-Xin

Abstract:

The NiTi cladding with/without Ni interlayer was prepared on stainless steel (SS) by tungsten inert gas (TIG) surfacing process, aiming at achieving good cavitation erosion resistance. The ranking according to the cavitation erosion resistance is NiTi plate > NiTi-Ni-TIG cladding > NiTi-TIG cladding > SS. The better cavitation erosion resistance of NiTi-TIG and NiTi-Ni-TIG claddings than SS substrate is due to their higher micro-hardness and superelasticity. Furthermore, the existence of Ni interlayer can decrease the amount of brittle intermetallic compounds, such as Fe2Ti, and inhibit the crack generation, which results in the higher cavitation erosion resistance of NiTi-Ni-TIG compared with NiTi-TIG cladding. Thus, the cavitation erosion resistance of NiTi cladding prepared by TIG surfacing process can be improved by employing Ni interlayer.

Key words: Cavitation erosion, NiTi, Cladding, Tungsten inert gas surfacing process, Ni interlayer