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ISIJ International, Special Issue on “Advances in TRIP effect Research”

 High strength and high ductility are important in developments of advanced steels from the standpoints of the improvements of mechanical properties and the growing use of steels and a number of studies have been carried out from various viewpoints using strength mechanisms. This special issue deals with TRIP (Transformation induced transformation) effect due to the deformation induced martensitic transformation of (retained) austenite. Lots of works about TRIP effect as represented by Angel (1954) and Zackay (1967) have been reported before and the TRIP steels are potential candidates for automotive applications. This special issue aims at presenting the latest findings of TRIP effect and TRIP steels from the basics to the advanced level.
 The TRIP effect is expected as an efficient strategy to develop TRIP steels with excellent strength-ductility balance in the researches of advanced high-strength steels (AHSS). On the other hand, there is room for further research into the relationship between the improvement of mechanical properties due to TRIP effect and the microstructure, the details of mechanical stability of retained austenite, and so on. This special issue is significant in order to gaining a better understanding of the current state of TRIP effect/TRIP phenomenon and is provided for publishing original papers concerning the latest ongoing researches and development activities.