The initiation and propagation of fetigue cracks from shot peened and unpeened surfaces in a medium steel were Studied through experiments.

• 通过对中碳钢在非喷丸与喷丸二情形下表面疲劳短裂纹的萌生与扩展试验，研究了喷丸对中碳钢表面疲劳短裂纹萌生与扩展的影响。