Concurrent strengthening of ultrafine-grained age-hardenable Al-Mg alloy by means of high-pressure torsion and spinodal decomposition

Tang, Yongpeng; Goto, Wataru; Hirosawa, Shoichi; Horita, Zenji; Lee, Seungwon; Matsuda, Kenji; Terada, Daisuke

doi:10.1016/j.actamat.2017.04.002

Cited by 55 publications

(14 citation statements)

References 44 publications

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“…The effect of clustering on the microstructural evolution in AlSi10Mg SLM specimens during aging should be studied as future research. It has been reported that Mg-Si co-clusters are formed in the 6000-family Al alloys (Al-Si-Mg) and 2000-family Al alloys (Al-Cu-Mg) by conventional wrought process [22, 23]. However, both single Mg clusters and Mg-Si co-clusters were observed in as-built state of SLM sample in this study.…”

Section: Resultsmentioning

confidence: 52%

Solute clustering and supersaturated solid solution of AlSi10Mg alloy fabricated by selective laser melting

Mishima

Oh-ishi

2019

Heliyon

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α-Al grains surrounded by Al-Si eutectic as the substructures in AlSi10Mg alloy fabricated by selective laser melting (SLM) were investigated in detail using three-dimensional atom-probe and transmission electron microscopy. Quantitative analysis of α-Al revealed (1) the formation of Mg clusters and Mg-Si co-clusters with a density in the order of 1023 /m3 in α-Al of the as-built state caused by the complicated thermal history, and (2) a supersaturated Si content that significantly exceeded the maximum solubility due to rapid solidification, during the SLM process.

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Section: Resultsmentioning

confidence: 52%

Solute clustering and supersaturated solid solution of AlSi10Mg alloy fabricated by selective laser melting

Mishima

Oh-ishi

2019

Heliyon

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“…[27][28][29][30][31] Concurrent strengthening of the Al-Mg alloy by means of HPT and by spinodal decomposition has recently been reported as well. 32 Similar as in Ref. 14, only microhardness was reported in this study providing no detailed information about the mechanical response of the HPT-processed Al-Mg alloy.…”

Section: Introductionsupporting

confidence: 45%

High strength nanocrystalline Cu–Co alloys with high tensile ductility

Bachmaier

Rathmayr²,

Schmauch

et al. 2018

J. Mater. Res.

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A supersaturated single-phase Cu-26 at.% Co alloy was produced by high-pressure torsion deformation, leading to a nanocrystalline microstructure with a grain size smaller than 100 nm. The nonequilibrium solid solution decomposed during subsequent isothermal annealing. In situ high-energy X-ray diffraction was used to map changes linked to the separating phases, and the development of a nanoscale Cu-Co composite structure was observed. To gain further information about the relationship of the microstructure and the mechanical properties after phase separation, uniaxial tensile tests were conducted on as-deformed and isothermally annealed samples. Based on the in situ diffraction data, different isothermal annealing temperatures were chosen. Miniaturized tensile specimens with a round cross section were tested, and an image-based data evaluation method enabled the evaluation of true stress-strain curves and strain hardening behavior. The main results are as follows: all microstructural states showed high strength and ductility, which was achieved by a combination of strain-hardening and strain-rate hardening.Andrea Bachmaier received her PhD in Materials Science at the University of Leobenin 2011. For her PhD research, she followed a novel strategy to produce supersaturated solidsolutions in immiscible alloy systems by a new two-step severe plastic deformation (SPD) process to obtain bulk specimens directly. Following graduation she spent two years in industry where she led a large research project funded by the Austrian Research Promotion Agency on advanced high-strength steels. In 2013, she was awarded an Erwin-Schrödinger scholarship that allowed her to work on the mechanisms behind bulk mechanical alloying, the decomposition process of supersaturated solid solutions and its influence on the thermal stability as well as on functional and mechanical properties. She leads a research group at the Erich Schmid Institute of Materials Science in Leoben Austria. Her current research primarily focuses on the generation of metastable materials, novel nanocomposites and nanocrystalline metal-matrix composites by SPD, and ERC Starting Grant funded program on SPD processed nanoscale magnetic materials. 58

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“…A moderate-to-high pre-strain induces a specific deformation structure that strongly affects the ageing behaviour [2,3,[5][6][7][8][10][11][12][13]. This occurs during extensive rolling owing to the formation of microshear bands (MBs) and/or lamellar structure with nanoscale interboundary spacings.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, an increasing pre-strain affects the contributions of different strengthening mechanisms to the overall σ YS [3,5,9,12,18]. These contributions were recognized to be additive [3][4][5][7][8][9][10][11][12][13][14][15][16][17][18] and expressed as follows:…”

Section: Introductionmentioning

confidence: 99%

Ageing response of cold-rolled Al–Cu–Mg alloy

Zuiko

Kaibyshev

2020

Materials Science and Engineering: A

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This work presents a detailed investigation of the ageing behaviour of AA2519 alloy subjected to cold rolling with reduction of 10-80% (ε~0.11-1.61). The impact of pre-straining level and ageing duration on the mechanical performance was elucidated via hardness and tensile testing, DSC and analytical TEM. The increasing rolling reduction followed by ageing reduces the peak age hardening and pronounces softening under overageing. This effect of pre-strain on mechanical properties is related to the dependence of a dispersion of plateshaped precipitates that form on the {001} α and {111} α planes on deformation structure. The results show that prior plastic strain profoundly changes kinetics of the ageing reaction and precipitation sequence. The peak age hardening is provided by the dense and homogeneous precipitation of a θ 0 -phase, while the over-ageing is attribute to the concurrent precipitation of the θ-phase on boundaries and thickening θ 0 -phase plates on dislocations. In addition, an Ω-phase platelets appear during ageing; however, its number density is insufficient to affect the mechanical properties, significantly.

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Concurrent strengthening of ultrafine-grained age-hardenable Al-Mg alloy by means of high-pressure torsion and spinodal decomposition

Cited by 55 publications

References 44 publications

Solute clustering and supersaturated solid solution of AlSi10Mg alloy fabricated by selective laser melting

Solute clustering and supersaturated solid solution of AlSi10Mg alloy fabricated by selective laser melting

High strength nanocrystalline Cu–Co alloys with high tensile ductility

Ageing response of cold-rolled Al–Cu–Mg alloy

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