In-situ neutron diffraction analysis on deformation behavior of duplex high Mn steel containing austenite and ɛ-martensite

Kwon, Ki Hyuk; Jeong, Jae-Suk; Choi, Jin-Won; Koo, Yang Mo; Tomota, Yō; Kim, Nack J.

doi:10.1007/s12540-012-5003-x

Cited by 16 publications

(9 citation statements)

References 21 publications

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“…Here, a 0 exerts a strong uniaxial compressive stress (in the hexagonal crystal coordinate system) on e due to the larger crystal volume of the former compared to the latter. 21,22 The above two paragraphs suggest that for the employed strain levels, e accommodates most of the internal strains caused by the shape misfit associated with phase transformation. 15,19 To further demonstrate the interphase stresses, Fig.…”

mentioning

confidence: 98%

An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading

Saleh

Brown

Pereloma

et al. 2015

Applied Physics Letters

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In-situ neutron diffraction during cyclic tension-compression loading (∼+3.5% to −2.8%) of a 17Mn-3Al-2Si-1Ni-0.06C steel that exhibits concurrent transformation and twinning -induced plasticity effects indicated a significant contribution of intragranular back stresses to the observed Bauschinger effect. Rietveld analysis revealed a higher rate of martensitic transformation during tension compared to compression. Throughout cycling, α′-martensite exhibited the highest phase strains such that it bears an increasing portion of the macroscopic load as its weight fraction evolves. On the other hand, the ε-martensite strain remained compressive as it accommodated most of the internal strains caused by the shape misfit associated with the γ→ε and/or ε→α′ transformations.

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mentioning

confidence: 98%

An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading

Saleh

Brown

Pereloma

et al. 2015

Applied Physics Letters

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“…[17,[23][24][25][26][27]). It is understood that the exact twin initiation stress will depend on the SFE value, grain size and crystallographic texture of the investigated TWIP steel.…”

Section: The Diffraction Elastic Constants and The Evolution Of Lattimentioning

confidence: 99%

A re-evaluation of “The micromechanics of twinning in a TWIP steel”

Saleh¹,

Gazder²

2016

Materials Science and Engineering: A

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“…Mn promotes the formation of austenite because it acts as an austenite stabilizer. [9][10][11][12][13] Al, a ferrite stabilizer, helps form a duplex structure of ferrite and austenite at high temperatures, and promotes the precipitation of j-carbides (composition: (Fe,Mn) 3 -Al-C, perovskite structure) during the cooling. [9][10][11][12] The amount of j-carbides varies with contents of Mn and Al as well as C.…”

Section: Introductionmentioning

confidence: 99%

“…It was also reported from the recent studies on ferritic light-weight steels that the retained austenite was not sufficiently stable due to the relatively low stacking-fault energy because of the lower Mn content than that of TWIP steels. [13,[17][18][19] However, detailed microstructures or deformation mechanisms of the ferritic Fe-Mn-Al-C steels are relatively unknown. In particular, studies on how alloying elements such as Mn affect the size, volume fraction, and distribution of secondary phases such as j-carbide, austenite, and martensite are rarely performed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mn Addition on Microstructural Modification and Cracking Behavior of Ferritic Light-Weight Steels

Sohn

Lee

et al. 2014

Metall Mater Trans A

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In the present study, effects of Mn addition on cracking phenomenon occurring during cold rolling of ferritic light-weight steels were clarified in relation to microstructural modification involving j-carbide, austenite, and martensite. Four steels were fabricated by varying Mn contents of 3 to 12 wt pct, and edge areas of steel sheets containing 6 to 9 wt pct Mn were cracked during the cold rolling. The steels were basically composed of ferrite and austenite in a band shape, but a considerable amount of j-carbide or martensite existed in the steels containing 3 to 6 wt pct Mn. Microstructural observation of the deformed region of fractured tensile specimens revealed that cracks which were initiated at ferrite/martensite interfacial jcarbides readily propagated along ferrite/martensite interfaces or into martensite areas in the steel containing 6 wt pct Mn, thereby leading to the center or edge cracking during the cold rolling. In the steel containing 9 wt pct Mn, edge cracks were found in the final stage of cold rolling because of the formation of martensite by the strain-induced austenite to martensite transformation, whereas they were hardly formed in the steel containing 12 wt pct Mn. To prevent or minimize the cracking, it was recommended that the formation of martensite during the cooling from the hot rolling temperature or during the cold rolling should be suppressed, which could be achieved by the enhancement of thermal or mechanical stability of austenite with decreasing austenite grain size or increasing contents of austenite stabilizers.

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In-situ neutron diffraction analysis on deformation behavior of duplex high Mn steel containing austenite and ɛ-martensite

Cited by 16 publications

References 21 publications

An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading

An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading

A re-evaluation of “The micromechanics of twinning in a TWIP steel”

Effect of Mn Addition on Microstructural Modification and Cracking Behavior of Ferritic Light-Weight Steels

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