Ferrite Transformation from Fe-0.3N Austenite

Mitsutaka SATO; Takamasa MURATA; Shota SHIMAYA; Goro MIYAMOTO; Tadashi FURUHARA

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Ferrite Transformation from Fe-0.3N Austenite

机译：Fe-0.3N奥氏体的铁素体转化

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Ferrite transformation behavior of Fe-0.3 mass%N binary alloy was studied in the temperature range between 500°C and 750°C. By isothermal holding in the α + γ two phase region, two morphologies of Allotoriomorphic ferrite (AF) and Widmanstetten ferrite (WF) formed from the prior γ grain boundary. On the other hand, in the case of isothermal holding at 500°C, nitride-free bainitic ferrite (BF) was formed at the beginning, and changed to bainite accompanied with γ' precipitation in further holding. The retained γ was obtained by decreasing the transformation temperature in the two phase region, and maximum volume fraction of 9% was obtained at 600°C. AF had near K-S OR with one side of the adjacent prior γ and grew into the grain without K-S OR. On the other hand, WF and BF had near K-S relationship with the matrix. Both WF and BF had significantly higher energy dissipation than AF, and the energy dissipation of AF is due to interfacial friction. On the other hand, the strain energy associated with the transformation was dominant in WF.

机译：在500℃和750℃之间的温度范围内研究Fe-0.3质量％N二元合金的铁氧体转化行为。通过在α+γ两相区域中的等温持有，由先前γ晶界形成的同种异体铁素体（AF）和Widmanstetten铁氧体（WF）的两种形态。另一方面，在500℃的等温保持的情况下，在开始时形成无氮化物贝氏体铁氧体（BF），并在进一步保持γ'沉淀的贝氏体上变为贝氏体。通过降低两个相区域中的转化温度获得保留的γ，在600℃下获得9％的最大体积分数。 AF在K-S附近或与相邻的先前γ的一侧近，并在没有K-S的情况下成长为晶粒。另一方面，WF和BF与矩阵有近K-S关系。 WF和BF都比AF显着更高，而AF的能量耗散是由于界面摩擦。另一方面，与转化相关的应变能量在WF中占优势。

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来源
《ISIJ international》 |2021年第1期|343-349|共7页
作者
Mitsutaka SATO; Takamasa MURATA; Shota SHIMAYA; Goro MIYAMOTO; Tadashi FURUHARA;
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作者单位

Institute for Materials Research Tohoku University Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan;

Graduate School Tohoku University Aoba-yama 02 Aoba-ku Sendai 980-8579 Japan;

Graduate School Tohoku University Aoba-yama 02 Aoba-ku Sendai 980-8579 Japan;

Institute for Materials Research Tohoku University Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan;

Institute for Materials Research Tohoku University Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
ferrite transformation; nitrogen alloy; retained austenite; energy dissipation;

机译：铁氧体转型;氮合金;保留奥氏体;能量耗散;

Ferrite Transformation from Fe-0.3N Austenite

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