STRAIN INDUCED MARTENSITIC TRANSFORMATION IN FATIGUE CRACK TIP ZONE FOR AN ULTRA-HIGH STRENGTH STEEL
超高强度钢疲劳塑性区内的应变诱发马氏体相变

The retained austenite at the fatigue plastic zone in a low-carbon mar-rensitic ultra-high strength steel transforms to martensite was observed. The influenceof this strain induced transformation on the fatigue behavior of the steel has beendiscussed.