Stress partitioning behavior of multilayered steels during tensile deformation measured by in situ neutron diffraction

Ojima, Masahiro; Inoue, Junya; Nambu, Shoichi; Xu, Pingguang; Akita, Koichi; Suzuki, Hiroshi; Koseki, Takafumi

doi:10.1016/j.scriptamat.2011.10.018

Cited by 99 publications

(45 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, when a multilayer steel sheet is subjected to uniaxial tensile stress or plane stress parallel to the sheet, the stress should be partitioned to both the hard and soft phases, and the partitioned stress should promote the deformation of not only the soft phases but also the hard phases, in contrast to the case of monolithic hard-phase dispersed steel. In fact, as will be described in detail later, in our studies, 5) the partitioning of applied stress was fully confirmed by performing neutron diffraction measurements during a tensile test on multilayer steel, and thereby, large elongation can be achieved in a layer of brittle as-quenched martensitic steel as well as in a ductile layer if the multilayer steel is suitably designed.…”

Section: Introductionsupporting

confidence: 68%

“…The stress partitioning was verified by in-situ neutron diffraction measurements during a tensile test of a multilayer steel consisting of low-carbon martensitic steel and Type 316 austenitic stainless steel. 5) The relationships between the applied stress and lattice strain obtained are shown in Fig. 12.…”

Section: Fabrication and Mechanical Properties Of Multilayer Steelsmentioning

confidence: 99%

See 1 more Smart Citation

Development of Multilayer Steels for Improved Combinations of High Strength and High Ductility

2014

View full text Add to dashboard Cite

Multilayer steels have been developed to provide a novel route to achieving higher-performance steels by employing a high-strength steel and a high-ductility steel independently in the layer structure. In this article, a background to the development, design, fabrication, properties, and applications of multilayer steels are overviewed. Multilayer steels exhibit improved combinations of strength and ductility compared with existing monolithic steels and also excellent deformation behaviors under high-strain-rate deformation as well as good formability. Those improved performances of multilayer steel are achieved by increased interfacial toughness between the layers and decreased thickness of the brittle steel layers according to the fracture toughness of the brittle steel and the strength of the ductile steel. The concept of multilayer steels is extended by applying different combinations of components, such as Mg-steel multilayer composite.

show abstract

Section: Introductionsupporting

confidence: 68%

Section: Fabrication and Mechanical Properties Of Multilayer Steelsmentioning

confidence: 99%

Development of Multilayer Steels for Improved Combinations of High Strength and High Ductility

2014

View full text Add to dashboard Cite

show abstract

“…To improve this situation, we have employed a multilayered steel composite, in which lath martensite can be uniformly elongated under uniaxial tension to a strain of over 50% by selecting an appropriate layer thickness and mechanical properties of each component. 13,14) This enhanced elongation enabled us to conduct detailed studies to clarify the unknown deformation behavior of lath martensite at larger strain levels, [15][16][17][18][19] and a number of findings regarding the local deformation behavior were obtained.…”

Section: Effects Of Solute Carbon On the Work Hardening Behavior Of Lmentioning

confidence: 99%

Effects of Solute Carbon on the Work Hardening Behavior of Lath Martensite in Low-Carbon Steel

et al. 2017

View full text Add to dashboard Cite

“…Such heterogeneities in strain and stress are called strain and stress partitioning, respectively. 38,39) Strain and stress partitioning between the phases in DP steels or other multiphase steels has experimentally been quantified by EBSD, [40][41][42] in-situ neutron diffraction, [42][43][44] high-energy X-ray diffraction, 38,45) DIC 22,30,[46][47][48][49] and lithography. 26,48,50) In this study, DIC is applied to quantify strain partitioning between ferrite and martensite phases during insitu tensile tests carried out in a SEM.…”

Section: Strain Partitioning Analysis By Dicmentioning

confidence: 99%

Tensile Behavior of Ferrite-martensite Dual Phase Steels with Nano-precipitation of Vanadium Carbides

et al. 2015

View full text Add to dashboard Cite

This paper reports the effect of nano-precipitation strengthening of ferrite on the tensile behavior of ferrite-martensite dual phase (DP) steels. Samples of ferrite-martensite DP steel containing a dispersion of nano-sized vanadium carbides (VCs) in the ferrite phase were produced by interphase precipitation and quenching of a V-added low carbon steel, and the mechanical properties are compared with those of conventional ferrite-martensite DP samples without VC particles. Both the yield stress and the ultimate tensile strength are significantly increased by nano-VC precipitates. For ferrite volume fractions of 20-50% a dispersion of VCs results in only a small change in the elongation, whereas for ferrite volume fractions of above 50% both uniform and post-uniform elongations are decreased by a VC dispersion. It is suggested that dispersion of nano-precipitates in ferrite is an effective approach to simultaneously improve the strength and the strength-ductility balance of DP steels. Digital image correlation (DIC) analysis demonstrates that the ferrite phase is more deformed than the martensite phase in both VC-free and VC-dispersed DP samples, but that such strain partitioning is less pronounced in the VC dispersion-hardened samples. It is found that the stress-strain relationship of DP samples can reasonably be explained based on a law of mixtures using partitioned strain and stress values as estimated from the DIC analysis.KEY WORDS: dual phase (DP) steel; interphase precipitation; vanadium carbides (VC); mechanical property; digital image correlation (DIC); strain and stress partitioning.

show abstract

Stress partitioning behavior of multilayered steels during tensile deformation measured by in situ neutron diffraction

Cited by 99 publications

References 11 publications

Development of Multilayer Steels for Improved Combinations of High Strength and High Ductility

Development of Multilayer Steels for Improved Combinations of High Strength and High Ductility

Effects of Solute Carbon on the Work Hardening Behavior of Lath Martensite in Low-Carbon Steel

Tensile Behavior of Ferrite-martensite Dual Phase Steels with Nano-precipitation of Vanadium Carbides

Contact Info

Product

Resources

About