The striation spacing in heat affect zone and welded seam samples was wider than that in matrix sample,this shows that fatigue crack propagation...

 
  • 焊縫區和熱影響區試樣的輝紋間距較基體區的大,說(shuō)明裂紋擴展速率快,焊縫和熱影響區的抗裂紋擴展性較基體差。
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