采用高能喷丸方法使工业纯钛疲劳试样的表层实现纳米化,并进行了疲劳试验.结果表明,高能喷丸后其表层组织发生严重塑性变形并实现组织纳米化,是提高弯曲疲劳寿命的主要原因.扫描电子显微镜分析发现,疲劳裂纹源的位置主要呈现为表层和次表层两种情况.在相同应力水平下,疲劳裂纹源在次表层时疲劳寿命较长,而疲劳裂纹源在表面时疲劳寿命很短,相应的疲劳试样的表面损伤也比较严重.
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