Effects of recrystallization annealing temperature on carbide precipitation, microstructure, and mechanical properties in Fe-18Mn-0.6C-1.5Al TWIP steel

Singon Kang, Yeon Seung Jung, Joong Hwan Jun, Young Kook Lee

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

The microstructure, dimple structure, and mechanical properties of a cold-rolled Fe-18Mn-0.6C-1.5Al TWIP steel were investigated as a function of annealing temperature. The recrystallization started at 600 °C and finished at 700 °C for the holding time of 10 min. The coarsening rate of recrystallized grains was increased over about 840 °C and Rockwell hardness was greatly decreased between 800 and 900 °C, which shows a good agreement with the equilibrium dissolution temperature of M3C carbides. The reversion of the tensile strength occurred between 700 and 800 °C because of the carbide precipitation hardening. The precipitation-time-temperature diagram was generated by dilatometric tests, showing a nose temperature of 800 °C. The dimple size was decreased to 700 °C and then increased again with higher annealing temperature, having a strong proportional relationship with austenite grain size.

Original languageEnglish
Pages (from-to)745-751
Number of pages7
JournalMaterials Science and Engineering A
Volume527
Issue number3
DOIs
Publication statusPublished - 2010 Jan 15

Fingerprint

Steel
carbides
Carbides
steels
mechanical properties
Annealing
Mechanical properties
microstructure
Microstructure
annealing
Rockwell hardness
Temperature
temperature
precipitation hardening
Age hardening
Coarsening
austenite
Austenite
tensile strength
dissolving

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "The microstructure, dimple structure, and mechanical properties of a cold-rolled Fe-18Mn-0.6C-1.5Al TWIP steel were investigated as a function of annealing temperature. The recrystallization started at 600 °C and finished at 700 °C for the holding time of 10 min. The coarsening rate of recrystallized grains was increased over about 840 °C and Rockwell hardness was greatly decreased between 800 and 900 °C, which shows a good agreement with the equilibrium dissolution temperature of M3C carbides. The reversion of the tensile strength occurred between 700 and 800 °C because of the carbide precipitation hardening. The precipitation-time-temperature diagram was generated by dilatometric tests, showing a nose temperature of 800 °C. The dimple size was decreased to 700 °C and then increased again with higher annealing temperature, having a strong proportional relationship with austenite grain size.",
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Effects of recrystallization annealing temperature on carbide precipitation, microstructure, and mechanical properties in Fe-18Mn-0.6C-1.5Al TWIP steel. / Kang, Singon; Jung, Yeon Seung; Jun, Joong Hwan; Lee, Young Kook.

In: Materials Science and Engineering A, Vol. 527, No. 3, 15.01.2010, p. 745-751.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Lee, Young Kook

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N2 - The microstructure, dimple structure, and mechanical properties of a cold-rolled Fe-18Mn-0.6C-1.5Al TWIP steel were investigated as a function of annealing temperature. The recrystallization started at 600 °C and finished at 700 °C for the holding time of 10 min. The coarsening rate of recrystallized grains was increased over about 840 °C and Rockwell hardness was greatly decreased between 800 and 900 °C, which shows a good agreement with the equilibrium dissolution temperature of M3C carbides. The reversion of the tensile strength occurred between 700 and 800 °C because of the carbide precipitation hardening. The precipitation-time-temperature diagram was generated by dilatometric tests, showing a nose temperature of 800 °C. The dimple size was decreased to 700 °C and then increased again with higher annealing temperature, having a strong proportional relationship with austenite grain size.

AB - The microstructure, dimple structure, and mechanical properties of a cold-rolled Fe-18Mn-0.6C-1.5Al TWIP steel were investigated as a function of annealing temperature. The recrystallization started at 600 °C and finished at 700 °C for the holding time of 10 min. The coarsening rate of recrystallized grains was increased over about 840 °C and Rockwell hardness was greatly decreased between 800 and 900 °C, which shows a good agreement with the equilibrium dissolution temperature of M3C carbides. The reversion of the tensile strength occurred between 700 and 800 °C because of the carbide precipitation hardening. The precipitation-time-temperature diagram was generated by dilatometric tests, showing a nose temperature of 800 °C. The dimple size was decreased to 700 °C and then increased again with higher annealing temperature, having a strong proportional relationship with austenite grain size.

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