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The fretting fatigue performance of Ti–6Al–4V alloy influenced by microstructure of CuNiIn coating prepared via thermal spraying
Tribology International ( IF 6.2 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.triboint.2019.106156
Amin Ma , Daoxin Liu , Xiaohua Zhang , Guangyu He , Dan Liu , Chengsong Liu , Xingchen Xu

Abstract Two types of CuNiIn coatings with different microstructures were successfully prepared on the surface of a Ti–6Al–4V alloy by means of high-velocity oxygen fuel (HVOF) and plasma spray (PS), respectively. The effect of the coating microstructure on the fretting fatigue (FF) resistance of the alloy as well as crack initiation and propagation was investigated. Compared with the HVOF-CuNiIn coating, the PS-CuNiIn coating was composed of a more significant lamellar microstructure and exhibited higher FF resistance. HVOF-CuNiIn possessed low resistance to crack initiation due to its low toughness, thus leading to a short FF life of the titanium alloy. The excellent FF resistance of the rotary flay peening (RFP)-treated sample resulted mainly from the large value of the compressive residual stress.

中文翻译:

热喷涂CuNiIn涂层微观结构对Ti-6Al-4V合金微动疲劳性能的影响

摘要 分别采用高速氧燃料(HVOF)和等离子喷涂(PS)在Ti-6Al-4V合金表面成功制备了两种不同微观结构的CuNiIn涂层。研究了涂层微观结构对合金的微动疲劳(FF)抗力以及裂纹萌生和扩展的影响。与 HVOF-CuNiIn 涂层相比,PS-CuNiIn 涂层由更显着的层状微观结构组成,并表现出更高的 FF 电阻。HVOF-CuNiIn由于韧性低而对裂纹萌生的抵抗力低,从而导致钛合金的FF寿命短。旋转剥落喷丸 (RFP) 处理样品的优异 FF 抗性主要是由于压缩残余应力值较大。
更新日期:2020-05-01
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