Microstructure evolution and mechanical properties of an Mg–Gd alloy subjected to surface mechanical attrition treatment

Shi, Xiaoying; Liu, Y.; Li, D.J.; Chen, Bin; Zeng, Xiaoqin; J, Lu; Ding, Wenjiang

doi:10.1016/j.msea.2015.02.009

Cited by 63 publications

(24 citation statements)

References 66 publications

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“…4c). It implied that the moderate extent of grain refinement could hardly cause a marked change in the original texture at this depth, in line with the previous researches [22,[31][32][33].…”

Section: Formation Of the Gradient Structuressupporting

confidence: 90%

“…7, 12) indicate that grain refinement occurred in these layers of both SMAT 0° and 90° samples compared to the original HR plate. The structures in these layers of both samples possessed coexistence of high-and low-angle boundaries (HABs and LABs), implying that the process of grain refinement proceeded to a moderate extent [22,[31][32][33]. ET was not observed in this layer of SMAT 0° sample (Fig.…”

Section: Formation Of the Gradient Structuresmentioning

confidence: 84%

“…The observed ETs were mainly close to the depth of 700 μm. This was because the structure close to the depth of 350 μm sustained higher strain, and dynamic recrystallization (DRX) tended to occur [31][32][33]. The DRX could cover the morphology of the former ETs.…”

Section: Formation Of the Gradient Structuresmentioning

confidence: 99%

“…7, 12). Previous researches [32,33] have elucidated that the grain refinement of Mg alloys during SMAT is mainly attributed to dynamic rotation recrystallization. During the plastic deformation induced by SMAT, subgrains/subcells tend to form at the early stage of straining; subsequently, dislocations propagate and glide to the sub-boundaries, resulting in an increase in the misorientation of boundaries by annihilation of dislocations.…”

Section: Formation Of the Gradient Structuresmentioning

confidence: 99%

See 3 more Smart Citations

Tension–Compression Yield Asymmetry Influenced by the Variable Deformation Modes in Gradient Structure Mg Alloys

Ning

Feng

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Surface mechanical attrition treatment (SMAT) was carried out on hot-rolled AZ31 Mg samples along two orthogonal directions; as a result, two types of gradient structures with different grain sizes and texture components in different layers were produced. The tension-compression yield asymmetry (YA) was studied using samples with different thicknesses, in order to elucidate the effect of combinations of variable deformation modes operating in different layers of the two oriented SMAT samples. The 0° oriented SMAT sample containing layers with strong basal texture displayed significant YA, because of either dislocation slip or extension twinning domination during tension or compression. By contrast, the 90° oriented SMAT sample containing layers with coexisting orthogonal texture components had an obviously weakened YA, which was attributed to the multi-deformation modes cooperating during tension or compression, i.e., extension twinning or detwinning in conjunction with dislocation slips, leading to close yield stresses compared between tension and compression.

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Section: Formation Of the Gradient Structuressupporting

confidence: 90%

Section: Formation Of the Gradient Structuresmentioning

confidence: 84%

Section: Formation Of the Gradient Structuresmentioning

confidence: 99%

Section: Formation Of the Gradient Structuresmentioning

confidence: 99%

See 2 more Smart Citations

Tension–Compression Yield Asymmetry Influenced by the Variable Deformation Modes in Gradient Structure Mg Alloys

Ning

Feng

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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“…Mg-3Gd alloy samples were deformed through surface mechanical attrition treatment (SMAT) at room temperature [21]. Heat treatment was conducted in a salt bath furnace held at 275°C for 1 h. Crystallography of ITBs before and after annealing was observed using transmission electron microscopy (TEM, FEI-CM200T) and high-angle annular darkfield scanning transmission electron microscopy (HAADF-STEM, aberration corrected FEI Titan™ 80-300).…”

mentioning

confidence: 99%

Formation of a new incoherent twin boundary in a Mg–3Gd alloy

et al. 2016

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Microstructure and Mechanical Properties of AZ31B Magnesium Alloy via Ultrasonic Surface Rolling Process

Geng

Zhang

et al. 2021

Adv Eng Mater

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Ultrasonic surface rolling process (USRP) is a recently developed surface nanocrystallization technology which introduces ultrasonic into surface mechanical rolling technology. By means of USRP, a near‐polished,gradient nanostructured surface and high compressive residual stresses were generated on the AZ31B magnesium alloy. The electron backscattered diffraction is used to characterize the microstructure. It was found that the twinning was the main deformation mechanism in tensile test, while grain refinement and twinning were dominant during the USRP. The results show that the thick of affected layer was up to 600 μm and consisted of three layers: an ultrafine grain layer with thickness of about 180 μm on the topmost surface, a fine grain transition layer under ultrafine layer up to 420 μm and a twin layer distributed from the surface to 600 μm. Combined with Schmid factor (SF), evolution of twins and texture were analysed and were responsible for improvement of strength.

show abstract

Microstructure evolution and mechanical properties of an Mg–Gd alloy subjected to surface mechanical attrition treatment

Cited by 63 publications

References 66 publications

Tension–Compression Yield Asymmetry Influenced by the Variable Deformation Modes in Gradient Structure Mg Alloys

Tension–Compression Yield Asymmetry Influenced by the Variable Deformation Modes in Gradient Structure Mg Alloys

Formation of a new incoherent twin boundary in a Mg–3Gd alloy

Microstructure and Mechanical Properties of AZ31B Magnesium Alloy via Ultrasonic Surface Rolling Process

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