Multiple mechanisms of lath martensite plasticity

Morsdorf, Lutz; Jeannin, Olivier; Barbier, David; Mitsuhara, Masatoshi; Raabe, Dierk; Taşan, Cemal Cem

doi:10.1016/j.actamat.2016.09.006

Cited by 221 publications

(90 citation statements)

References 59 publications

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“…9a. Such heterogeneity based on the sequence of martensitic transformation has also been observed for martensitic steel [31]. Upon deformation, strain localizes primarily in high aspect ratio laths that represent soft spots in the microstructure as shown in Fig.…”

Section: Discussionsupporting

confidence: 62%

Deformation and failure mechanisms of Ti–6Al–4V as built by selective laser melting

Moridi

Demir

Caprio

et al. 2019

Materials Science and Engineering: A

104

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Section: Discussionsupporting

confidence: 62%

Deformation and failure mechanisms of Ti–6Al–4V as built by selective laser melting

Moridi

Demir

Caprio

et al. 2019

Materials Science and Engineering: A

104

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“…Invaluable information can be extracted from this synergy between experiments and simulations, for example well designed constitutive equations and their parameters [20,40,41,42,4,43,44].…”

mentioning

confidence: 99%

On the use of SEM correlative tools for in situ mechanical tests

et al. 2018

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In situ SEM mechanical tests are key to study crystal plasticity. In particular, imaging and diffraction (EBSD) allow microstructure and surface kinematics to be monitored all along the test. However, to get a full benefit from different modalities, it is necessary to register all images and crystallographic orientation maps from EBSD into the same frame. Different correlative approaches tracking either Pt surface markings, crystal orientations or grain boundaries, allow such registrations to be performed and displacement as well as rotation fields to be measured, a primary information for crystal plasticity identification. However, the different contrasts that are captured in different modalities and unavoidable stage motions also give rise to artifacts that are to be corrected to register the different information onto the same material points. The same image correlation tools reveal very powerful to correct such artifacts. Illustrated by an in situ uniaxial tensile test performed on a bainitic-ferritic steel sample, recent advances in image correlation techniques are reviewed and shown to provide a comprehensive picture of local strain and rotation maps.

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“…At the same time, in the subsequent ART process, the reverted RA readily nucleated along the lath martensite boundary, and finally, a strip-shaped RA having a relatively small size can be obtained at ambient temperature. As reported by Morsdorf et al [18] the reverse transformed strip-shaped RA readily nucleated along the lath martensite or original austenite grain boundary; thus, the finer strip-shaped RA at ambient temperature can be obtained by refining the size of the martensite lath. The XRD patterns and measured austenite fraction of the samples are presented in Figure 4a-c. As shown in Figure 4a, the diffraction intensities of γ(200) austenite peak of the CQ2-ART and CQ3-ART samples has a markedly enhanced tendency compared to the CQ1-ART sample.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 60%

A Novel Cyclic-Quenching-ART for Stabilizing Austenite in Nb–Mo Micro-Alloyed Medium-Mn Steel

Liu

Qi-chun

Xue

et al. 2019

Metals

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In the context of obtaining an excellent elongation and tensile-strength combination in the third generation of advanced high strength steel, we emphasized the practical significance of adjusting the retained austenite fraction and stability in medium-Mn steel to obtain better mechanical properties. A novel cyclic quenching and austenite reverse transformation (CQ-ART) was used to obtain a large retained austenite content in Fe-0.25C-3.98Mn-1.22Al-0.20Si-0.19Mo-0.03Nb (wt.%) Nb–Mo micro-alloyed medium-Mn steel. The results show that after twice cyclic quenching and ART, the alloy exhibited optimum comprehensive properties, characterized by an ultimate tensile strength of 838 MPa, a total elongation of 90.8%, a product of strength and elongation of 76.1 GPa%, and the volume fraction of austenite of approximately 62 vol.%. The stability of retained austenite was significantly improved with the increasing of the number of cyclic quenching. Moreover, the effects of CQ-ART on the microstructure evolution, mechanical properties, C/Mn partitioning behavior, and austenite stability were investigated. Further, the strengthening effect of microalloying elements Nb–Mo was also discussed.

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Multiple mechanisms of lath martensite plasticity

Cited by 221 publications

References 59 publications

Deformation and failure mechanisms of Ti–6Al–4V as built by selective laser melting

Deformation and failure mechanisms of Ti–6Al–4V as built by selective laser melting

On the use of SEM correlative tools for in situ mechanical tests

A Novel Cyclic-Quenching-ART for Stabilizing Austenite in Nb–Mo Micro-Alloyed Medium-Mn Steel

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