Strength and Ductility with Dual Grain-Size and Texture Gradients in AZ31 Mg Alloy

Yan, Jiawei; Ma, Jiawei; Wang, Jian; Shen, Yao

doi:10.1007/s11661-018-4874-y

Cited by 11 publications

(3 citation statements)

References 38 publications

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“…The weakening of texture is the direct result of the grain refinement during SPD [14,15]. RCMR method can be beneficial for controlling the grain structure and texture of the deformed material.…”

Section: Resultsmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Urbańczyk-Gucwa¹,

Brzezińska²,

Adamczyk‐Cieślak

et al. 2019

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Microstructure and texture of the CuCr0.6 alloy processed by rolling with cyclic movement of rolls (RCMR) at room temperature were investigated. The RCMR processing was applied for the samples in different initial conditions in the solid solution followed by quenching into iced water at 1000 o C for 3 h and in aging treatment conditions performed at 500 o C for 2 h and at 700 o C for 24 h. Application of the solution and aging processes prior to RCMR deformation results in the partial dissolution of Cr particles into the Cu matrix and precipitation of the second phase particles. RCMR processing with value of the total effective strain (ε ft ) of 5 was introduced to the material. It was found that the RCMR method is effective in texture weakening. The obtained results revealed that there is a large similarity in texture orientations after RCMR processing independently of heat treatment conditions. Cyclic character of deformation leads to an incomplete transition of LAB to HAB.

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Section: Resultsmentioning

confidence: 99%

“…Generally, formation of UFG structures manifests itself in microstructural and textural hardening [2,10]. It is known, that for SPD processed materials microstructural hardening may be insignificant in comparison with textural hardening [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Urbańczyk-Gucwa¹,

Brzezińska²,

Adamczyk‐Cieślak

et al. 2019

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“…Gradient materials are a new category of material in which certain intrinsic microstructural characteristics and/or properties, such as grain/precipitate size, chemical composition, magnetism, are distributed in gradient along the depth [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Gradient metals have exhibited great potentials for broad engineering applications due to enhanced properties of high strength, considerable ductility, and fatigue resistance, as compared to their homogeneous coarse-grained (CG) counterparts [ 5 , 6 , 7 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

Bao

Zhang

et al. 2021

Nanomaterials

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Gradient-nanostructured material is an emerging category of material with spatial gradients in microstructural features. The incompatibility between gradient nanostructures (GNS) in the surface layer and coarse-grained (CG) core and their roles in extra strengthening and strain hardening have been well elucidated. Nevertheless, whether similar mechanisms exist within the GNS is not clear yet. Here, interactions between nanostructured layers constituting the GNS in a Ni alloy processed by surface mechanical rolling treatment were investigated by performing unique microtension tests on the whole GNS and three subdivided nanostructured layers at specific depths, respectively. The isolated nanograined layer at the topmost surface shows the highest strength but a brittle nature. With increasing depths, isolated layers exhibit lower strength but enhanced tensile plasticity. The GNS sample’s behavior complied more with the soft isolated layer at the inner side of GNS. Furthermore, an extra strain hardening was found in the GNS sample, leading to a greater uniform elongation (>3%) as compared to all of three constituent nanostructured layers. This extra strain hardening could be ascribed to the effects of the strain gradients arising from the incompatibility associated with the depth-dependent mechanical performance of various nanostructured layers.

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Continuous Grain Size Gradients in Austenitic Incoloy 800H: Design, Processing, and Characterization

Bishop

Mucalo

Kral

et al. 2020

Metall Mater Trans A

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Grain size variations are common in thermo-mechanically processed alloys with non-uniform cold work. A method to produce samples with grain size gradients was developed using Incoloy 800H.Two tensile samples with non-uniform gages were designed with finite element analysis and manufactured. Measured strain profiles were consistent with designs, and maximum von Mises strains of (18.6 ± 6.1) % and (13.6 ± 4.6) % were obtained. After annealing, an area 40 mm × 5 mm was mapped by electron backscatter diffraction. Totals of 2849 and 2569 grains were identified after merging twins. Both samples had duplex grain structures as defined in ASTM E1181. Grains were binned into 4 mm strips to evaluate the spatial grain size distribution. Grain size gradients of 0.0081 mm 2 /mm and 0.0112 mm 2 /mm were obtained. Simulated grain growth of the linear gradient microstructure was consistent with accelerated growth predictions. This new method of making samples will enable laboratory studies of gradient grain size effects in realistic industrial alloy microstructures. Further, samples could be used for parallel, single specimen experiments on phenomena that depend on grain size such as complexion transitions and fatigue. Most importantly, high-throughput parallel testing of microstructures enabled by our method could accelerate materials discovery and qualification in fields such as high entropy and nuclear alloys.Research funded by Methanex New Zealand Ltd.

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Strength and Ductility with Dual Grain-Size and Texture Gradients in AZ31 Mg Alloy

Cited by 11 publications

References 38 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Gradient Enhanced Strain Hardening and Tensile Deformability in a Gradient-Nanostructured Ni Alloy

Continuous Grain Size Gradients in Austenitic Incoloy 800H: Design, Processing, and Characterization

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