Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments
Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments
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DOI：
10.1007/s00339-010-5672-6
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
M. Turski;S. Clitheroe;A. Evans;C. Rodopoulos;D. Hughes;P. Withers
中科院分区：
文献类型：
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作者：
M. Turski;S. Clitheroe;A. Evans;C. Rodopoulos;D. Hughes;P. Withers
四种机械表面处理已被认为是应用于奥氏体不锈钢结构。喷丸（SP）、激光冲击喷丸（LSP）、超声冲击处理（UIT）和水射流空化喷丸（WJCP）（也称为空化无喷丸（CSP））已应用于8 mm厚的304型奥氏体不锈钢试样。本研究认为，这些机械表面处理的优点，在其对表面粗糙度，微观结构，塑性工作水平和通过厚度的残余应力分布的影响。显微组织的研究表明，马氏体的形成接近每个过程的处理表面。样品中的残余应力测量显示，与更常规的SP处理的样品相比，LSP、UIT和WJCP样品的压缩应力达到显著更大的深度。
Four mechanical surface treatments have been considered for the application to austenitic stainless steel structures. Shot peening (SP), laser shock peening (LSP), ultrasonic impact treatment (UIT) and water jet cavitation peening (WJCP), also known as cavitation shotless peening (CSP), have been applied to 8 mm thick Type 304 austenitic stainless steel coupons. This study considers the merits of each of these mechanical surface treatments in terms of their effect on the surface roughness, microstructure, level of plastic work and through thickness residual stress distribution. Microstructural studies have revealed the formation of martensite close to the treated surface for each process. Residual stress measurements in the samples show compressive stresses to a significantly greater depth for the LSP, UIT and WJCP samples compared to the more conventional SP treated sample.