An examination of microstructural evolution in a Pb–Sn eutectic alloy processed by high-pressure torsion and subsequent self-annealing

Zhang, Nian Xian; Kawasaki, Megumi; Huang, Yi; Langdon, Terence G.

doi:10.1016/j.msea.2020.140653

Cited by 6 publications

(2 citation statements)

References 68 publications

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“…Microhardness increased gradually during storage, reaching ~13.0 ± 0.5 Hv after 7 days of storage, and further increased to ~14.4 ± 0.3 Hv and ~14.9 ± 0.7 Hv after 42 days and 56 days of storage, respectively. Similar behavior was widely reported in low melting temperature materials processed by severe plastic deformation, for example, in the Zn-Al, Sn-Pb and Bi-Sn alloys [16,17,[19][20][21][22]. However, it is worth noting that microhardness of the Bi-Sn (57/43) alloy after t-HPS processing is more stable compared When the microstructure was observed under a lower magnification, it was noticed that the shear deformation was not homogeneous and there were some narrow dense lamellar bands visible in the matrix.…”

Section: Resultssupporting

confidence: 84%

Microstructural Evolution and Tensile Testing of a Bi–Sn (57/43) Alloy Processed by Tube High-Pressure Shearing

Wang

et al. 2021

Crystals

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Tube high-pressure shearing (t-HPS) processing was performed on a eutectic Bi–Sn (57/43) alloy for 0.25, 1, 5 and 20 turns. The selected samples were stored at room temperature for up to 56 days to examine the strain weakening and self-annealing behavior of the alloy. The results showed that t-HPS processing gradually refined the microstructure and led to decreasing of microhardness, but microhardness increased slowly during the subsequent storage at room temperature. Shear localization of the eutectic structure during t-HPS processing was observed as large amounts of narrow dense lamellar zones were visible in the deformed microstructures. The Bi–Sn (57/43) alloy processed by t-HPS exhibited significantly enhanced superplastic properties with elongations up to >1800% in a sample after t-HPS processing for 20 turns. This high elongation is attributed to the breaking of the lamellar structure and the very small grain size.

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Section: Resultssupporting

confidence: 84%

Microstructural Evolution and Tensile Testing of a Bi–Sn (57/43) Alloy Processed by Tube High-Pressure Shearing

Wang

et al. 2021

Crystals

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“…The solute content of the low-soluble elements in aluminum, Nb [41,42], Co [43], V [44,45], Zr [46,47], and Ti [26], increases, and a strong extension of the Mn [4,48] and Mg [49] solubility is observed. For the same reasons [50][51][52][53][54][55][56][57][58], solute content increased significantly after high-pressure torsion [59][60][61]. Elemental metal powders are usually used for mechanical alloying [62,63].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pre-Milling on the Mn Solid Solubility in the Al-Mn-Cu Alloy during Mechanical Alloying

Yakovtseva

Emelina

Mochugovskiy

et al. 2023

Metals

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Increasing the strength of Al-based alloys is an important issue of physical metallurgy and industrial processing. Severe plastic deformation and related extension of solid solubility during mechanical alloying provide an opportunity for significant strengthening due to grain refinement, solid solution, and precipitation strengthening mechanisms. During mechanical alloying, an anomalous increase in the solid-state solubility of alloying elements occurs. The present study focuses on the investigation of the pre-milling treatment to the microstructure, phase composition, and solubility in Al-7.7 Mn-3.5 Cu (wt%) alloy processed by a high-energy ball milling of Al-14.3 Mn-6.5 Cu (wt%) master alloy diluted with Al powder. During milling, the mean granular size decreased to ~5 µm, and a strong grain refinement occurred. According to our TEM and XRD data, ball milling provided a mean grain size of 13–14 nm and a microhardness of 490–540 HV. The lattice parameter of the Al-based solid solution decreased with an increase in the milling time to 7.5–10 h, which suggested the dissolution of the alloying elements, and the lattice parameter increased at a higher milling time of 12.5–40 h, which suggested the decomposition of the solid solution. The XRD data revealed the dissolution of the Al6Mn and Al20Cu2Mn3 solidification-originated phases with a further precipitation of the Al6Mn dispersoids. Pre-milling of the master alloy entailed a significant decrease in the minimal lattice parameter value from 0.4029 nm to 0.4023 nm due to an increase in the Mn solute content from 6.2 wt% (3.3 at%) to 7.5 wt % (4.0 at%) in the studied alloy during high-energy ball milling.

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Unveiling the Room-Temperature Softening Phenomenon and Texture Evolution in Room-Temperature-Rolled Cu–0.13Sn Alloys

Gupta,

Kaushik,

Yoo

et al. 2024

Metall Mater Trans A

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An examination of microstructural evolution in a Pb–Sn eutectic alloy processed by high-pressure torsion and subsequent self-annealing

Cited by 6 publications

References 68 publications

Microstructural Evolution and Tensile Testing of a Bi–Sn (57/43) Alloy Processed by Tube High-Pressure Shearing

Microstructural Evolution and Tensile Testing of a Bi–Sn (57/43) Alloy Processed by Tube High-Pressure Shearing

Influence of Pre-Milling on the Mn Solid Solubility in the Al-Mn-Cu Alloy during Mechanical Alloying

Unveiling the Room-Temperature Softening Phenomenon and Texture Evolution in Room-Temperature-Rolled Cu–0.13Sn Alloys

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