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Effects of annealing conditions on microstructure and mechanical properties of low carbon, manganese transformation-induced plasticity steel

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Abstract

The effects of annealing conditions on microstructural evolution and mechanical properties have been investigated in low carbon, manganese TRIP (Mn TRIP) steel based on a 0.12C-6Mn-0.5Si-3Al alloy system. The microstructure of cold-rolled sheet subjected to annealing at 760 °C to 800 °C for 30 s to 1800 s consists of a recrystallized ferrite matrix and fine-grained austenite with a phase fraction of 25 % to 35 %. Variation of the annealing conditions remarkably influenced the characteristics of constituent phases and thus affected the tensile strength and elongation. Optimization of microstructural parameters such as grain size and fraction of constituent phases, which control the yield strength, overall work hardening, and the kinetics of strain-induced martensite formation, is thus critical for obtaining an exceptional mechanical balance of the alloy.

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Author notes

  1. Dong-Woo Suh

    Present address: Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang-si, Gyeongbuk, 790-784, Korea

Authors and Affiliations

  1. Structural Materials Division, Korea Institute of Materials Science (KIMS), Chanwon-si, Gyeongnam, 641-010, Korea

    Jae-Myeong Jang, Sung-Joon Kim, Kyung-Mox Cho & Dong-Woo Suh

  2. School of Materials Science and Engineering, Pusan National University, Busan, 609-390, Korea

    Jae-Myeong Jang, Nam Hyun Kang & Kyung-Mox Cho

Authors
  1. Jae-Myeong Jang
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  2. Sung-Joon Kim
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  3. Nam Hyun Kang
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  4. Kyung-Mox Cho
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  5. Dong-Woo Suh
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Correspondence to Dong-Woo Suh.

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Jang, JM., Kim, SJ., Kang, N.H. et al. Effects of annealing conditions on microstructure and mechanical properties of low carbon, manganese transformation-induced plasticity steel. Met. Mater. Int. 15, 909–916 (2009). https://doi.org/10.1007/s12540-009-0909-7

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  • DOI: https://doi.org/10.1007/s12540-009-0909-7

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