Effect of carbon content on selection of slip system during uniaxial tensile deformation of lath martensite

Ryou, KenHee; Nambu, Shoichi; Koseki, Takafumi

doi:10.1016/j.msea.2020.139090

Cited by 21 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The deformation mechanism can also be evaluated using the Schmid factor mapping. The {110} < 111 > and {112} < 111 > as the main slip systems of BCC and BCT crystallographic structures [66][67][68] were selected and used to extract the Schmid factors. Figs.…”

Section: Discussionmentioning

confidence: 99%

On the bending of MS1-P20 hybrid steels additively manufactured using laser powder bed fusion

Shakerin

Sanjari²,

Pirgazi³

et al. 2022

Materialia

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

On the bending of MS1-P20 hybrid steels additively manufactured using laser powder bed fusion

Shakerin

Sanjari²,

Pirgazi³

et al. 2022

Materialia

View full text Add to dashboard Cite

“…Therefore, this strain localization appears to be either intralath slip along the habit plane [64] or substructure boundary sliding over a lath boundary that is not clearly visible in the BSE images. This will be investigated in future work [44].…”

Section: High-resolution Dic Studymentioning

confidence: 97%

A Nanomechanical Testing Framework Yielding Front&Rear-Sided, High-Resolution, Microstructure-Correlated SEM-DIC Strain Fields

et al. 2022

View full text Add to dashboard Cite

Background The continuous development of new multiphase alloys with improved mechanical properties requires quantitative microstructure-resolved observation of the nanoscale deformation mechanisms at, e.g., multiphase interfaces. This calls for a combinatory approach beyond advanced testing methods such as microscale strain mapping on bulk material and micrometer sized deformation tests of single grains. Objective We propose a nanomechanical testing framework that has been carefully designed to integrate several state-of-the-art testing and characterization methods. Methods (i) Well-defined nano-tensile testing of carefully selected and isolated multiphase specimens, (ii) front&rear-sided SEM-EBSD microstructural characterization combined with front&rear-sided in-situ SEM-DIC testing at very high resolution enabled by a recently developed InSn nano-DIC speckle pattern, (iii) optimized DIC strain mapping aided by application of SEM scanning artefact correction and DIC deconvolution for improved spatial resolution, (iv) a novel microstructure-to-strain alignment framework to deliver front&rear-sided, nanoscale, microstructure-resolved strain fields, and (v) direct comparison of microstructure, strain and SEM-BSE damage maps in the deformed configuration. Results Demonstration on a micrometer-sized dual-phase steel specimen, containing an incompatible ferrite-martensite interface, shows how the nanoscale deformation mechanisms can be unraveled. Discrete lath-boundary-aligned martensite strain localizations transit over the interface into diffuse ferrite plasticity, revealed by the nanoscale front&rear-sided microstructure-to-strain alignment and optimization of DIC correlations. Conclusions The proposed testing and alignment framework yields front&rear-sided aligned microstructure and strain fields providing 3D interpretation of the deformations and opening new opportunities for unprecedented validation of advanced multiphase simulations.

show abstract

“…組織の関係が明らかにされている [11][12][13][14][15][16] 。DIC 解析は，ひずみの定量評価とその可視化に利点がある。加えて，DIC 解析は，低温変形にも適用可能であることが確認されている 17,18) 。マルテンサイト鋼では，引張変形によってブロックを単位として不均一にひずみが導入されることがわかっている 19,20) 。フェライト母相と残留オーステナイトから成る変態誘起塑性(TRIP)鋼においても，引張変形によりひずみは不均一に導入される 21 Table 1. Chemical composition of 9mass%Ni steel (in mass%).…”

Section: ル画像相関(Dic)法を適用することで，変形挙動と金属unclassified

9 mass%Ni鋼の低温変形挙動

Koga,

Kumon,

Watanabe

2024

Tetsu-to-Hagane

View full text Add to dashboard Cite

The strain distribution in the 9 mass%Ni steel introduced by tensile deformation at cryogenic temperature was visualized using a digital image correlation method, and the relationship between the strain distribution and the microstructure of the steel was systematically investigated. Based on the obtained results, the factors that influence the strain distribution were discussed. In the present 9mass%Ni steel, regions consisting of tempered-and fresh-martensite and austenite (TFMA) were embedded in the tempered martensite matrix. The volume fraction of the retained austenite varied along the normal direction of the hot-rolled plates, indicating that Ni segregation occurred during the manufacturing process. As the tensile stress increased, the total elongation remained constant with decreasing temperature. Strain was introduced inhomogeneously via tensile deformation at 77 K. The high-and low-strain regions tended to be distributed in a unit of the block, indicating that the deformability differed among the blocks. The average strain in the block (ε block ) was strongly correlated with the Schmid factor of the slip system on the habit plane (SF habit ) and area fraction of TFMA in a block (A MA ). The least absolute shrinkage and selection operator regression revealed that the contributions of SF habit and A MA to ε block were nearly equal. Therefore, the deformability of the block in the 9 mass%Ni steel is dominated by SF habit and A TFMA .

show abstract

Effect of carbon content on selection of slip system during uniaxial tensile deformation of lath martensite

Cited by 21 publications

References 32 publications

On the bending of MS1-P20 hybrid steels additively manufactured using laser powder bed fusion

On the bending of MS1-P20 hybrid steels additively manufactured using laser powder bed fusion

A Nanomechanical Testing Framework Yielding Front&Rear-Sided, High-Resolution, Microstructure-Correlated SEM-DIC Strain Fields

9 mass%Ni鋼の低温変形挙動

Contact Info

Product

Resources

About