Alloying effect on reverse transformation from tempered martensite

Goro Miyamoto; Hirokazu Usuki; Zhao Dong Li; Tadashi Furuhara

Alloying effect on reverse transformation from tempered martensite

Goro Miyamoto, Hirokazu Usuki, Zhao Dong Li, Tadashi Furuhara

Materials Design Division

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

Abstract

Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.

Original language	English
Title of host publication	Proceedings of the 17th IFHTSE Congress
Publisher	The Japan Society for Heat Treatment (JSHT)
Pages	482-485
Number of pages	4
ISBN (Electronic)	9780000000002
Publication status	Published - 2008 Jan 1
Event	17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, Japan Duration: 2008 Oct 26 → 2008 Oct 28

Publication series

Name	Proceedings of the 17th IFHTSE Congress
Volume	2

Other

Other	17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
Country	Japan
City	Kobe
Period	08/10/26 → 08/10/28

Keywords

Austenite
Cementite
Kinetics
Martensite
Reverse transformation

ASJC Scopus subject areas

Surfaces, Coatings and Films
Condensed Matter Physics
Mechanics of Materials

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Alloying effect on reverse transformation from tempered martensite. / Miyamoto, Goro; Usuki, Hirokazu; Li, Zhao Dong; Furuhara, Tadashi.

Proceedings of the 17th IFHTSE Congress. The Japan Society for Heat Treatment (JSHT), 2008. p. 482-485 (Proceedings of the 17th IFHTSE Congress; Vol. 2).

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

Miyamoto, G, Usuki, H, Li, ZD & Furuhara, T 2008, Alloying effect on reverse transformation from tempered martensite. in Proceedings of the 17th IFHTSE Congress. Proceedings of the 17th IFHTSE Congress, vol. 2, The Japan Society for Heat Treatment (JSHT), pp. 482-485, 17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008, Kobe, Japan, 08/10/26.

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abstract = "Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.",

keywords = "Austenite, Cementite, Kinetics, Martensite, Reverse transformation",

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AB - Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.

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