Residual Stress Gradients in AISI 9254 Steel Springs Submitted to Shot Peening and Heat Treatment for Increased Fatigue Resistance
Residual Stress Gradients in AISI 9254 Steel Springs Submitted to Shot Peening and Heat Treatment for Increased Fatigue Resistance
复制标题
经过喷丸和热处理以提高抗疲劳性的 AISI 9254 钢弹簧中的残余应力梯度
DOI：
10.4028/www.scientific.net/amr.996.749
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
P. Brito
中科院分区：
文献类型：
--
作者：
Larissa Vilela Costa;José Rubens Gonçalves Carneiro;Rogério Pinto Coelho Catalão;Omar Khayyam Ribas;P. Brito
钢构件中表面和次表面残余应力的存在对疲劳抗力具有显著影响。本文研究了AISI 9254钢螺旋弹簧经热处理和多次喷丸处理后的表面改性。样品进行了表征，在作为卷，淬火，淬火和回火，以及提交单，双喷丸处理。深度分辨的残余应力分布的测定结合电解溶解的钢的X射线衍射。疲劳试验后，通过扫描电子显微镜进行断裂分析。这是可能的，表明双喷丸导致直接次表面区域中的压缩应力的增加，这相对于其他测试条件提高了抗疲劳性。
The presence of surface and subsurface residual stresses in steel components has a significant influence on fatigue resistance. In the present work, surface modification of AISI 9254 steel coil springs by heat treatment and multiple shot-peening procedures was investigated. Samples were characterized in the as-coiled, quenched, quenched and tempered, as well as submitted to single and double shot peening treatments. Depth resolved residual stress profiles were determined by X-ray diffraction combined with electrolytic dissolution of the steel. Fracture analysis was performed subsequent to fatigue tests by scanning electron microscopy. It was possible to show that double shot peening led to an increase in compressive stresses in the immediate sub-surface region, which improved fatigue resistance relative to the other tested conditions.