利用透射显微技术和X射线衍射分析技术,对工业纯钛在喷丸、滚压两种强化方式下的组织和残余应力进行了对比研究.结果表明:1)TEM组织中均可观察到位错和变形孪晶.滚压形成了单个分散的孪晶,喷丸表层中形成大量相互交叠的孪晶和变形带;疲劳后,喷丸组织中产生孪晶-孪晶的交互作用,而滚压组织中是孪晶-晶界的交互作用.2)喷丸较滚压强化表层残余应力松弛显著,疲劳后两者的表层残余应力相当;3)喷丸较滚压粗糙度高一个数量级.并依上述分析对表面机械强化机理进行了解释.
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