点击次数：

论文类型：期刊论文

发表时间：2011-06-01

发表刊物：ACTA METALLURGICA SINICA-ENGLISH LETTERS

收录刊物：Scopus、SCIE、EI

卷号：24

期号：3

页面范围：243-248

ISSN号：1006-7191

关键字：Austenitic stainless steels; Microstructure; Mechanical properties; Solution treatment; Sigma phase

摘要：A detailed knowledge of changes in microstructures and mechanical properties that occur in AISI 321 stainless steels service before and after solution treatment is of great interest, since the ductility and toughness of AISI 321 stainless steels may change drastically after service for a long time. After solution treatment at 1050 degrees C, the microstructures of AISI 321 stainless steels service for 80 000 h at 700 degrees C indicate that the content of sigma phase significantly decreased, the grains of austenite grew and the amount of twins together with the size increased with solution treatment time. The results of mechanical properties tests show that the impact toughness at room temperature was superior at solution treatment, and there was no obvious change in the impact toughness between different times of solution treatment at room temperature.