It is considered that special structure of the dislocation and damage accumulation induced by rolled were main factors to make the fatigue strength of the welded joint reduced after rolled prestrain.
分析认为，辊压后材料中位错的特殊结构和材料内部所形成的损伤累积是疲劳性能下降的主要原因。
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The first Peugeot 307 sedan rolled off the assembly line yesterday at PSA Peugeot Citroen's joint venture (JV) with China's Dongfeng Motor Corp in Wuhan, capital of Central China's Hubei Province.