Effects of warm working on microstructural and shear deformation properties of TRIP-aided martenitic steel

Tomohiko Hojo, Takuya Kochi, Koh Ichi Sugimoto

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The effects of warm working on microstructural, retained austenite characteristics and shear deformation properties of 0.2C-1.5Si-1.5Mn-1.0Cr-0.2Mo TRIP-aided martensitic (TM) steel for applications to automotive frame and forging parts were investigated. When warm working at 550 oC and post cooling at 1 oC/s was conducted to the TM steel, volume fractions of retained austenite and martensite-austenite constituent phase increased and mixture matrix of ultra fine granular bainitic ferrite and fine bainitic ferrite lath was obtained, whereas microstructure of TM steel warm worked at 750 oC exhibited granular bainitic ferrite matrix. These were caused by the dynamic recrystallization and the promotion of bainitic transformation of austenite due to the worm forging at 550 oC with the post cooling rate of 1 oC/s. Maximum shear stress decreased and total shear displacement increased with decreasing working temperature in TM steel. These were caused by the effective strain induced transformation of a large amount of retained austenite and the refined matrix structure.

本文言語English
ホスト出版物のタイトルTHERMEC 2016
編集者Christof Sommitsch, Mihail Ionescu, Brajendra Mishra, Brajendra Mishra, Ernst Kozeschnik, T. Chandra
出版社Trans Tech Publications Ltd
ページ2312-2317
ページ数6
ISBN(印刷版)9783035711295
DOI
出版ステータスPublished - 2017
外部発表はい
イベント9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
継続期間: 2016 5 292016 6 3

出版物シリーズ

名前Materials Science Forum
879
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

Other9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
国/地域Austria
CityGraz
Period16/5/2916/6/3

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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