Effect of Ultrasonic Peening and Accelerated Corrosion Exposure on the Residual Stress Distribution in Welded Marine Steel
Effect of Ultrasonic Peening and Accelerated Corrosion Exposure on the Residual Stress Distribution in Welded Marine Steel
复制标题
超声波喷丸和加速腐蚀暴露对焊接船用钢残余应力分布的影响
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Fitzpatrick
中科院分区：
文献类型：
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作者：
B. Ahmad;M. Fitzpatrick
用焊接接头制备了DH36船用钢试样。残余应力测量的样品上进行焊接，超声喷丸处理后，和超声喷丸后的加速腐蚀暴露。采用中子衍射和等值线法测定了残余应力分布。焊接引入拉伸近表面残余应力，接近材料的屈服强度，超声波喷丸覆盖这与压缩残余应力。通过腐蚀去除材料，通过去除一层应力材料，略微降低了峰值表面压应力，但不会导致残余应力分布的显著重新分布。
Specimens of DH36 marine steel were prepared with welded attachments. Residual stress measurements were made on the samples as-welded, following an ultrasonic peening treatment, and following accelerated corrosion exposure after ultrasonic peening. Neutron diffraction and the contour method were used for determining the residual stress profiles. The welding introduces tensile near-surface residual stress, approaching the material yield strength, and the ultrasonic peening overlays this with a compressive residual stress. Material removal by corrosion decreases the peak surface compressive stress slightly, by removal of a layer of stressed material, but does not cause significant redistribution of the residual stress profile.