Synthesis of fine Pb–50 vol.-%Sn alloys by a new process of reciprocating extrusion

Yuan, Shi-Ying; Peng, Chih Wei

doi:10.1179/026708399101506274

Cited by 13 publications

(4 citation statements)

References 8 publications

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“…alloys fabricated by cyclic extrusion compression (CEC) technique which originally proposed by Richert and Richert [6]. On the other hand, previous studies on materials such as pure Al [6,7], Al alloys [8,9], Mg-15Al-1Zn [10], Pb-50 vol.% Sn alloys [11] revealed that CEC can refine grains, second phase structures and inclusions. Regarding the refining mechanism, Yeh et al [10,12,13] proposed that particle fragmentation, dynamic recrystallization and repeated mass flow during deformation refine the grains and inclusions.…”

Section: Introductionmentioning

confidence: 98%

Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Chen

Wang

Roven

et al. 2008

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 98%

Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Chen

Wang

Roven

et al. 2008

Journal of Alloys and Compounds

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“…The limiting grain size or phase size has been related to the dominant contribution of superplastic flow induced by grain boundary sliding to the strain during extrusion. [28] Consequently, dislocation motion and multiplication were inhibited to induce dynamic recrystallization for further grain refining.…”

Section: A Distribution Of Inclusionsmentioning

confidence: 99%

Microstructural evolution and superplasticity of Al-5.8Mg-0.23Mn alloys processed by reciprocating extrusion

Lee

2005

Metall Mater Trans A

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This study developed the reciprocating extrusion method to refine the inclusions and grain structure of Al-5.8Mg-0.23Mn alloys to enhance their strength and superplasticity without prior homogenization treatment. Alloy cast billets were extruded with an extrusion ratio of 10:1 at 450 °C for one, five, or ten passes. The grain size was reduced to 4.6 m, and the coarse inclusions refined to 2 m, after ten passes. A subgrain structure was formed in the interior of the fine grains, indicating that dynamic recrystallization occurred during extrusion. In this study, dynamic recrystallization in the billet was repeatedly induced by a number of extrusion passes until a limiting grain size was obtained. Thereafter, dynamic recrystallization was no longer activated because grain boundary sliding, instead of dislocation gliding, accommodated the deformation strain required for extrusion. The alloys extruded in ten-passes extrusion were found to be stronger and more ductile than commercial Al-Mg alloys and showed improved superplastic behavior at 500 °C not only from low to high strain rate but also with a small flow stress of less than 30 MPa. These advantages demonstrate that reciprocating extrusion can produce Al-Mg alloys with improved mechanical properties making them good candidates for high-strain-rate superplastic forming.

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“…These methods include powder metallurgy, stir casting and spray co-deposition, etc [7] . Since the technology of reciprocating extrusion can eliminate the shrinkage porosity in the cast alloy, refine the grains and thus improve the properties of alloy, it attracts much attention from materials scientists in recent years, and was successfully applied to produce particle reinforced metal matrix composites [8][9] . H. S. Chu and J. W. Yeh [10][11] et al produced Al matrix composites of high properties through reciprocating extrusion.…”

Section: Introductionmentioning

confidence: 99%

Al<sub>2</sub>O<sub>3</sub>/Al Composites Consolidated from Alumina and Aluminum Particulates by Reciprocating Extrusion

Zhang

Gao

et al. 2011

AMR

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MMCs can be usually fabricated by powder metallurgy, stir casting and spray co-deposition, etc. Al2O3/Al composites were produced by means of reciprocating extrusion with alumina and pure aluminum particulates in the present study. The microstructure was analyzed by scanning electronic microscope, and the mechanical properties were measured by hardness tester and universal testing machine, respectively. The results showed that Al2O3/Al composites with as high as 20 vol.% alumina can be successfully produced by reciprocating extrusion. During reciprocating extrusion process, the reinforced alumina particles can be fragmentized and uniformly distributed in the aluminum matrix. The tensile strength and hardness of the composites increase as volume fraction of alumina particles increases, whereas the elongation decreases. Compared with the pure aluminum compact, the tensile strength and hardness of the composite with 20 vol.% alumina particles is 29.3% and 93.5% higher, respectively; whereas the elongation decreases 66.6%, and the fracture mechanism of the composites is attributed to ductile rupture.

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Synthesis of fine Pb–50 vol.-%Sn alloys by a new process of reciprocating extrusion

Cited by 13 publications

References 8 publications

Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression

Microstructural evolution and superplasticity of Al-5.8Mg-0.23Mn alloys processed by reciprocating extrusion

Al<sub>2</sub>O<sub>3</sub>/Al Composites Consolidated from Alumina and Aluminum Particulates by Reciprocating Extrusion

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