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Journal articles
Superplastic Property of the Ti-6Al-4V Alloy with Ultrafine-Grained Heterogeneous Microstructure
Abstract : Ti–6Al–4V alloy having a heterogeneous microstructure composed of ultrafine-equiaxed-α-grains and fine-lamellar-α-grains is investigated for microstructural changes during superplastic deformation at temperature of 700 °C. The Ti–6Al–4V alloy having an optimum fraction of fine-lamellar-α-grains exhibits an excellent superplastic property and the highest elongation of 583% (tested at 700 °C 10−3 s−1). This is mainly due to the optimized activation of grain-boundary-sliding and additional accommodation mechanism associated with frequent occurrences of dynamic recrystallization and β precipitation at boundaries during deformation of the heterogeneous starting microstructure. The present result suggests the possibility that optimizing the starting microstructure so as to have an optimum heterogeneous-microstructure serves as an additional stress accommodation mechanism and leads to a large superplastic elongation.
Keywords :
Superplasticity
Microstructure
Cited literature [3 references]
https://hal-mines-albi.archives-ouvertes.fr/hal-01693763
Contributor : Imt Mines Albi Imt Mines Albi <>
Submitted on : Thursday, May 31, 2018 - 9:53:38 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:55 PM
Long-term archiving on: : Saturday, September 1, 2018 - 12:53:19 PM
Contributor : Imt Mines Albi Imt Mines Albi <>
Submitted on : Thursday, May 31, 2018 - 9:53:38 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:55 PM
Long-term archiving on: : Saturday, September 1, 2018 - 12:53:19 PM
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Matsumoto_et_al-2018.pdf
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