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Effect of Nitrogen Partitioning on Yield Strength in Nitrogen-Alloyed Duplex Stainless Steel During Annealing

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Abstract

Nitrogen partitioning and its effect on the yield strength in nitrogen-alloyed duplex stainless steel during annealing were investigated at different annealing temperatures. The decrease in the austenite fraction with an increase in the annealing temperature promoted nitrogen partitioning into austenite. When the nitrogen content in austenite was low, the yield strength decreased with an increase in the annealing temperature due to grain growth, while when it was higher than 0.5 wt pct, the yield strength increased with an increase in the annealing temperature, because the austenite became noticeably hard.

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This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea. The work of one author (H.N.H.) was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2013008806). The authors wish to thank Yong-Min Kim for his valuable support for the nanoindentation test.

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Hanyang University, Seongdong-ku, Seoul, 133-791, Republic of Korea

    Min-Ho Jang (Ph.D. Student)

  2. Ferrous Alloy Department, Advanced Metallic Materials Division, Korea Institute of Materials Science, 797 Changwondaero, Seongsangu, Changwon, Gyeongnam, 642-831, Republic of Korea

    Min-Ho Jang (Ph.D. Student), Joonoh Moon (Senior Researcher), Tae-Ho Lee (Principal Researcher) & Seong-Jun Park (Principal Researcher)

  3. Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Republic of Korea

    Heung Nam Han (Professor)

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  1. Min-Ho Jang
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  2. Joonoh Moon
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  3. Tae-Ho Lee
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  4. Seong-Jun Park
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Correspondence to Joonoh Moon.

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Manuscript submitted August 5, 2013.

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Jang, MH., Moon, J., Lee, TH. et al. Effect of Nitrogen Partitioning on Yield Strength in Nitrogen-Alloyed Duplex Stainless Steel During Annealing. Metall Mater Trans A 45, 1653–1658 (2014). https://doi.org/10.1007/s11661-014-2210-8

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  • DOI: https://doi.org/10.1007/s11661-014-2210-8

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