Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels

Koh Ichi Sugimoto; Mitsuhiro Itoh; Tomohiko Hojo; Shun Ichi Hashimoto; Shushi Ikeda; Goro Arai

doi:10.4028/0-87849-428-6.4309

Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels

Koh Ichi Sugimoto, Mitsuhiro Itoh, Tomohiko Hojo, Shun Ichi Hashimoto, Shushi Ikeda, Goro Arai

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Citations (Scopus)

Abstract

Ultra high-strength low-alloyed TRIP-aided steels possess high impact toughness, fatigue strength and hydrogen embrittlement performance, as well as good formability. So, it is expected that the TRIP-aided steels are applied to some automotive parts such as not only center pillar but also driving parts, spring and bolts. In the present study, the effects of ausforming conditions (temperature and strain) after austenitizing on tensile properties and toughness of TRJJP-aided steels with bainitic ferrite matrix were investigated to develop a new type of ultra high-strength forging steel. TRIP-aided steel with chemical composition of 0.2%C, 0.5%Si, 1.5%Mn, 1.0%Al, 0.02%Nb and 0.1 %Mo achieved large total elongation and high impact toughness by ausforming to 0-50% strain at 600-900°C, followed by austempering at 400°C for 500s. This was mainly caused by refined microstructure and stabilized retained austenite.

Original language	English
Title of host publication	Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006
Publisher	Trans Tech Publications Ltd
Pages	4309-4314
Number of pages	6
Edition	PART 5
ISBN (Print)	0878494286, 9780878494286
DOIs	https://doi.org/10.4028/0-87849-428-6.4309
Publication status	Published - 2007 Jan 1
Externally published	Yes
Event	5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, Canada Duration: 2006 Jul 4 → 2006 Jul 8

Publication series

Name	Materials Science Forum
Number	PART 5
Volume	539-543
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Other

Other	5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
Country	Canada
City	Vancouver
Period	06/7/4 → 06/7/8

Keywords

Ausforming
High strength steel
Microstructure
Retained austenite
TRIP-aided steel
Tensile properties
Toughness

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.4028/0-87849-428-6.4309

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Cite this

Sugimoto, K. I., Itoh, M., Hojo, T., Hashimoto, S. I., Ikeda, S., & Arai, G. (2007). Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels. In Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006 (PART 5 ed., pp. 4309-4314). (Materials Science Forum; Vol. 539-543, No. PART 5). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-428-6.4309

Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels. / Sugimoto, Koh Ichi; Itoh, Mitsuhiro; Hojo, Tomohiko; Hashimoto, Shun Ichi; Ikeda, Shushi; Arai, Goro.

Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006. PART 5. ed. Trans Tech Publications Ltd, 2007. p. 4309-4314 (Materials Science Forum; Vol. 539-543, No. PART 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Sugimoto, KI, Itoh, M, Hojo, T, Hashimoto, SI, Ikeda, S & Arai, G 2007, Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels. in Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006. PART 5 edn, Materials Science Forum, no. PART 5, vol. 539-543, Trans Tech Publications Ltd, pp. 4309-4314, 5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006, Vancouver, Canada, 06/7/4. https://doi.org/10.4028/0-87849-428-6.4309

Sugimoto KI, Itoh M, Hojo T, Hashimoto SI, Ikeda S, Arai G. Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels. In Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006. PART 5 ed. Trans Tech Publications Ltd. 2007. p. 4309-4314. (Materials Science Forum; PART 5). https://doi.org/10.4028/0-87849-428-6.4309

Sugimoto, Koh Ichi ; Itoh, Mitsuhiro ; Hojo, Tomohiko ; Hashimoto, Shun Ichi ; Ikeda, Shushi ; Arai, Goro. / Microstructure and mechanical properties of ausformed ultra high-strength TRIP-aided steels. Supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2006. PART 5. ed. Trans Tech Publications Ltd, 2007. pp. 4309-4314 (Materials Science Forum; PART 5).

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