GRAIN REFINING OF ( alpha plus alpha prime ) TWO PHASE STAINLESS STEEL.

Setsuo Takaki, Takehisa Seo, Youichi Tokunaga

Research output: Contribution to journalArticle

Abstract

The microduplex process of a Fe-16%Cr-5%Mo-8%Co-2%Ni alloy has been investigated. The alloy has a fully ferritic structure after quenching from 1573 K, then austenite (followed by martensitic transformation during air cooling) decomposes from the ferrite during reheating up to the temperature range of the ( alpha plus gamma ) phase. If the ferrite was cold rolled about 90% prior to reheating, strain-induced precipitation of Laves phase occurs in the temperature range 850-950 K. On 923 K aging, the precipitates play role in suppression of subgrain growth. In the temperature range 1000-1300 K, austenite nucleates along slip bands and deformation twins, resulting in a microduplex structure. At temperatures above 1300 K where recrystallization of ferrite matrix can preferentially occur, the structure coarsened.

Original languageEnglish
Pages (from-to)896-901
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume48
Issue number9
Publication statusPublished - Sep 1984

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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