In-situ EBSD study of deformation behaviour of 600 MPa grade dual phase steel during uniaxial tensile tests

Li, Shengci; Guo, Chengyu; Hao, Leilei; Kang, Yonglin; An, Yongling

doi:10.1016/j.msea.2019.05.083

Cited by 108 publications

(20 citation statements)

References 21 publications

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“…Owing to the reciprocal relationship between the SF and TF (although it cannot exactly correspond to the SF calculation for a given grain [37]), a higher SF usually results in a lower TF. Generally, higher TF values are associated with a higher yield strength, indicating that the grain is "harder" [47]. Fig.…”

Section: Interphase Boundary Analysismentioning

confidence: 94%

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Zhang

Wang

Zhou

et al. 2020

Materials Science and Engineering: A

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The redistribution of alloying elements and the crystallographic characterizations in wire and arc additive manufactured (WAAM) super duplex stainless steel (SDSS) was investigated from the wire to the final as-deposited structure. The results showed that elemental partitioning between austenite and ferrite was suppressed in the last layer and the solidified droplet. The high Ni content but low Cr and N contents in the initial state of the intragranular austenite (IGA) confirmed the predominance of the chromium nitrides acted as the nucleation sites. Gathering of nitrogen was found more distinct in the coarsening IGA, Widmanstätten austenite (WA) than the grain boundary austenite (GBA). The columnar epitaxial ferrite presented a strong <001> texture in the deposition direction, while the <001> and <101> orientations was found in the austenite. Random orientations of the intragranular secondary austenite was revealed. The Rotated Cube texture of the austenite grains were consumed by the "recrystallization" textures (Brass, Rotated Brass, Cu, R, E, and F) caused by the austenite reformation. The low-angle interphase boundaries between austenite and ferrite were predominated in the as-deposited wall, and, at which, the K-S orientation took the crucial part. A Taylor factor analysis revealed that through fabrication via additive process, the austenite became oriented "harder" and contributed most to good mechanical properties. The textured microstructure contributed about a 2.6% higher engineering strain in the Z direction and a 27.8 MPa higher yield strength in the X direction.

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Section: Interphase Boundary Analysismentioning

confidence: 94%

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Zhang

Wang

Zhou

et al. 2020

Materials Science and Engineering: A

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“…A HiTACHI H‐8100 TEM was used to observe the width of martensite laths and distribution of dislocation in laths. The electron back scattering diffraction (EBSD) was carried out in ZEISS microscope to characterize the submicrosturctures of lath martensite by electropolishing with 5 vol% perchloric acid 12 …”

Section: Methodsmentioning

confidence: 99%

“…Previous researches considered that the martensite packet size is the effective size 6,7 . However, some other researches confirmed that block size governed the effective size through various tests 8–13 . Shen et al 8 investigated the substructure of as‐quenched martensite in a 0.08C–0.3Si–0.6Mn–4.8Ni–0.6Cr alloy; it is found that the boundaries of two adjacent blocks in the same packet were high angle boundaries with high‐intensity dislocations and each block had a specific angle to the {100} planes.…”

Section: Introductionmentioning

confidence: 99%

Effect of lath martensite submicrostructure on mechanical properties and crack propagation behaviour by in‐situ tension in 0.09C–1.7Mn–0.6Cr steel

Guo

Hao

et al. 2020

Fatigue Fract Eng Mat Struct

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The present paper was aimed at understanding the effect of lath martensite submicrostructure quenched at different austenitizing temperature on the crack propagation behaviour. Different techniques were used to characterize the details of microstructure and submicrostructure. In-situ tensile tests with scanning electron microscope were performed to observe the propagation of the crack. The results illustrated that packet size and block size increase almost linearly with the increasing austenitizing temperature. However, austenitizing temperature has no significant effect on the size of laths. Both of the packet size and the block size match the Hall-Petch relationship well with a correlation coefficient of 0.99. In macro tensile tests and in-situ tension, the deflection angle of crack encountered with prior austenite grain boundary is higher than 60 , while it is lower than 90 for packet boundary and 60 for block boundary.

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“…The grain boundaries between laths in bainite were mainly low-angle grain boundaries, most of which were observed at the 1/4-thickness position of the steel plate. The grain boundaries between polygonal ferrites were principally high-angle grain boundaries [17,18], most of which were observed at the 1/2-thickness position of the steel plate. Figure 6.…”

Section: Microstructural Evolution Analysismentioning

confidence: 99%

Effect of Roller Quenching on Microstructure and Properties of 300 mm Thickness Ultra-Heavy Steel Plate

Han

Wang

et al. 2020

Metals

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In this paper, a 300 mm thickness ultra-heavy steel plate was selected as the research object. In addition, special roller quenching equipment and a new testing method were used to measure the quenching temperature curve at different positions of the steel plate. The relationships and corresponding interaction mechanisms between cooling rate, microstructure, and mechanical properties of an ultra-heavy steel plate during roller quenching were investigated. The results indicated that the cooling rate, strength, hardness, and impact energy decreased gradually along the thickness direction of the plate, while the cooling rate, average grain size, and mechanical properties were relatively uniform with little change along the length direction of the plate. The experimental results provide an effective way to further control the microstructure and properties of ultra-heavy steel plates during roller quenching.

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In-situ EBSD study of deformation behaviour of 600 MPa grade dual phase steel during uniaxial tensile tests

Cited by 108 publications

References 21 publications

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Effect of lath martensite submicrostructure on mechanical properties and crack propagation behaviour by in‐situ tension in 0.09C–1.7Mn–0.6Cr steel

Effect of Roller Quenching on Microstructure and Properties of 300 mm Thickness Ultra-Heavy Steel Plate

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In-situ EBSD study of deformation behaviour of 600 MPa grade dual phase steel during uniaxial tensile tests

Cited by 108 publications

References 21 publications

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Element partitioning and electron backscatter diffraction analysis from feeding wire to as-deposited microstructure of wire and arc additive manufacturing with super duplex stainless steel

Effect of lath martensite submicrostructure on mechanical properties and crack propagation behaviour by in‐situ tension in 0.09C–1.7Mn–0.6Cr steel

Effect of Roller Quenching on Microstructure and Properties of 300 mm Thickness Ultra-Heavy Steel Plate

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In-situ EBSD study of deformation behaviour of 600 MPa grade dual phase steel during uniaxial tensile tests