Journal ArticleDOI
Influence of refined hierarchical martensitic microstructures on yield strength and impact toughness of ultra-high strength stainless steel
TLDR
In this article, the hierarchical martensitic features in ultra-high strength stainless steel (UHSSS), including the prior austenite grains, martensite packets, blocks and laths with the descending size, were refined to various extents by employing different thermomechanical processes and then carefully characterized.About:
This article is published in Journal of Materials Science & Technology.The article was published on 2020-08-15. It has received 115 citations till now. The article focuses on the topics: Martensite & Austenite.read more
Citations
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A novel medium-Mn steel with superior mechanical properties and marginal oxidization after press hardening
TL;DR: In this article, a novel Cr-alloyed medium-Mn steel was designed and manufactured for the hot forming application in automobile, which possesses more excellent mechanical combination and enormously reduced oxidization after press hardening.
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Correlation between the microstructure and hydrogen embrittlement resistance in a precipitation-hardened martensitic stainless steel
TL;DR: In this paper, a custom 465 precipitation-hardened stainless steel was subjected to various thermal treatments and then evaluated using tensile testing with a slow strain rate after electrochemical hydrogen charging.
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Roles of pre-formed martensite in below-Ms bainite formation, microstructure, strain partitioning and impact absorption energies of low-carbon bainitic steel
TL;DR: In this paper, the role of pre-formed martensite (PM) in below-Ms bainite formation, microstructure, crystallography, strain partitioning and mechanical properties of a low-carbon bainitic steel were investigated using electron-backscattered diffraction, transmission electron microscopy, micro digital image correlation technique and mechanical tests.
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Effects of carbon and molybdenum on the nanostructural evolution and strength/ductility trade-off in Fe40Mn40Co10Cr10 high-entropy alloys
TL;DR: In this paper , the effects of carbon and molybdenum on the strain-induced nanostructural evolution and strength-ductility trade-off were investigated at room temperature (RT) and cryogenic temperature (CT).
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High strength-superplasticity combination of ultrafine-grained ferritic steel: The significant role of nanoscale carbides
TL;DR: In this article, the authors describe the mechanistic basis of obtaining high strength-high plasticity combination in an ultrafine-grained (UFG) (∼500 ± 30 nm) ferritic steel with nano-size carbides, which sustained large plastic deformation, exceeding 100 % elongation at a temperature significantly below the absolute melting point (Tm).
References
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The morphology and crystallography of lath martensite in Fe-C alloys
TL;DR: In this article, the morphology and crystallography of lath martensite in Fe-C alloys containing various carbon contents from 0.0026 to 0.61% were studied by analyzing electron back scattered diffraction patterns in scanning electron microscopy and Kikuchi diffraction pattern in transmission electron microscope.
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The morphology and crystallography of lath martensite in alloy steels
TL;DR: The morphology and crystallography of lath martensite in two Mn-containing interstitial free steels and a maraging steel were examined in detail by a combination of transmission electron microscopy, electron backscatter diffraction in a scanning electron microscope and optical microscopy.
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Effect of microstructural refinement on the toughness of low carbon martensitic steel
TL;DR: In this paper, backscattered diffraction analysis of the cleavage crack path shows that the packet boundaries can strongly hinder fracture propagation, and thus martensitic packets can act as the effective microstructure unit for cleavage.
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Void growth by dislocation emission
TL;DR: In this paper, a criterion for the emission of a dislocation from the surface of a void under remote tension is formulated, analogous to Rice and Thomsons criterion for crack blunting by dislocation emission from the crack tip.
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Segregation engineering enables nanoscale martensite to austenite phase transformation at grain boundaries: A pathway to ductile martensite
Dierk Raabe,Stefanie Sandlöbes,J. Millán,Dirk Ponge,Hamid Assadi,Michael Herbig,Pyuck-Pa Choi +6 more
TL;DR: In this article, a phase field model was proposed to predict the kinetics of phase transformation at segregation decorated grain boundaries, showing that strong interface segregation of austenite stabilizing elements (here Mn) and the release of elastic stresses from the host martensite can generally promote phase transformation.