STT and DTT Diagrams of Austenitic Cr–Mn–Ni As‐Cast Steels and Crucial Thermodynamic Aspects of γ → α′ Transformation

STT and DTT Diagrams of Austenitic Cr–Mn–Ni As‐Cast Steels and Crucial Thermodynamic Aspects of γ → α′ Transformation
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奥氏体 CrâMnâNi 铸钢的 STT 和 DTT 图以及 γ 转变的关键热力学方面

DOI:
10.1002/srin.201100267
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发表时间:
2012
影响因子:
2.2
通讯作者:
Scheller
Scheller
中科院分区:
材料科学3区
文献类型:
--
作者:
Kovalev;Scheller

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采用静态拉伸试验、光学显微镜和磁标法检测铁磁相分数,研究了不同镍含量的新型奥氏体Cr-Mn-Ni铸钢在不同温度下变形过程中的力学行为和显微组织演变。为了总结所有关于变形诱导过程的知识,我们开发了Cr-Mn-Ni钢的STT和DTT图。图表说明了不同的变形机制取决于温度和张力载荷,并量化了变形机制的延伸率。变形诱导的ε′和α′马氏体形成和孪晶——TRIP和TWIP效应——发生在Cr-Mn-Ni钢中,这取决于化学成分和温度。变形诱导过程的差异取决于热力学,并由热力学计算证实。测定了所研究的Cr-Mn-Ni钢的γ→α′相变成核阈值。
The mechanical behavior and microstructure evolution during deformation of novel austenitic Cr–Mn–Ni as‐cast steels with varied Ni content were investigated at various temperatures using static tensile tests, optical microscopy, and the magnetic scale for the detection of ferromagnetic phase fraction. To summarize all knowledge about the deformation‐induced processes, the STT and DTT diagrams were developed for Cr–Mn–Ni steels. The diagrams illustrate the different deformation mechanisms depending on temperature and tension load, and quantify the elongation of the deformation mechanisms. The deformation‐induced ε‐ and α' martensite formation and twinning – the TRIP and TWIP effects – occur in the Cr–Mn–Ni steels depending on the chemical composition and temperature. The differences of deformation‐induced processes depend on thermodynamics and are confirmed by thermodynamic calculations. The nucleation threshold of γ → α′ transformation was determined for the investigated Cr–Mn–Ni steels.
DOI: 10.4028/www.scientific.net/ssp.172-174.172
发表时间: 2011
期刊: Solid State Phenomena
影响因子: --
作者:
Martin;Martin;Krüger
通讯作者: Krüger
Werkstoffverhalten einer TRIP/TWIP-fähigen CrMnNi-Stahlgusslegierung bis zu hohen Dehnraten*
DOI: 10.3139/120.110165
发表时间: 2010
期刊: Materials Testing
影响因子: 2.5
作者:
L. Krüger;S. Wolf;Stefan Martin;Markus Rüssel;U. Martin;A. Jahn;A. Weiss;Piotr R. Scheller
通讯作者: Piotr R. Scheller
DOI: 10.1002/srin.201000245
发表时间: 2011
影响因子: 2.2
作者:
A. Kovalev;A. Jahn;A. Weiss;P. Scheller
通讯作者: P. Scheller