TY - JOUR
T1 - Extra strengthening and superplasticity of ultrafine-grained A2024 alloy produced by high-pressure sliding
AU - Masuda, Takahiro
AU - Takizawa, Yoichi
AU - Yumoto, Manabu
AU - Otagiri, Yoshiharu
AU - Horita, Zenji
N1 - Funding Information:
One of the authors (TM) would like to thank Grant-in-Aid for JSPS Research Fellow (No. JP16J07050) and Aluminium research grant program (of Japan Aluminium Association). This work was supported in part by Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials”, in part by the Light Metals Educational Foundation of Japan, and in part by Grant-in-Aid for Scientific Research (S) from the MEXT, Japan (No. JP26220909). HPS was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
Publisher Copyright:
© 2017 The Japan Institute of Light Metals.
PY - 2017
Y1 - 2017
N2 - In this study, the method of high-pressure sliding (HPS) was applied for grain refinement of an A2024 alloy. Sheet samples with 10-15 mm width and 100 mm length with 1 mm thickness were processed by HPS under pressures of 2-3 GPa. Microstructural observations revealed that the grain size was refined to ∼200 nm. Tensile tests showed that the ultimate tensile strength reached 886 MPa with a total elongation of 7.1% and the anisotropy of samples was less developed in the HPS-processed samples. Extra strengthening was attained by aging at 423 K after HPS processing, leading to an ultimate tensile strength of 967 MPa at the peak aged condition. Superplastic elongation of more than 400% appeared when the A2024 alloy processed by HPS for 20 mm was deformed in tension at a testing temperature of 623 K with an initial strain rate of 1.0× 10-3 s-1.
AB - In this study, the method of high-pressure sliding (HPS) was applied for grain refinement of an A2024 alloy. Sheet samples with 10-15 mm width and 100 mm length with 1 mm thickness were processed by HPS under pressures of 2-3 GPa. Microstructural observations revealed that the grain size was refined to ∼200 nm. Tensile tests showed that the ultimate tensile strength reached 886 MPa with a total elongation of 7.1% and the anisotropy of samples was less developed in the HPS-processed samples. Extra strengthening was attained by aging at 423 K after HPS processing, leading to an ultimate tensile strength of 967 MPa at the peak aged condition. Superplastic elongation of more than 400% appeared when the A2024 alloy processed by HPS for 20 mm was deformed in tension at a testing temperature of 623 K with an initial strain rate of 1.0× 10-3 s-1.
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U2 - 10.2320/matertrans.M2017242
DO - 10.2320/matertrans.M2017242
M3 - Article
AN - SCOPUS:85035112253
SN - 1345-9678
VL - 58
SP - 1647
EP - 1655
JO - Materials Transactions
JF - Materials Transactions
IS - 12
ER -