The Stability of Oxygen-Free Copper Processed by High-Pressure Torsion after Room Temperature Storage for 12 Months

被引：6
作者：
Alawadhi, Meshal Y. [1 ]
Sabbaghianrad, Shima [2 ,3 ]
Huang, Yi [4 ,5 ]
Langdon, Terence G. [2 ,3 ,5 ]
机构：
[1] PAAET, Coll Technol Studies, Dept Mfg Engn, POB 42325, Shuwaikh 70654, Kuwait
[2] Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[3] Univ Southern Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
[4] Bournemouth Univ, Fac Sci & Technol, Dept Design & Engn, Poole BH12 5BB, Dorset, England
[5] Univ Southampton, Dept Mech Engn, Mat Res Grp, Southampton SO17 1BJ, Hants, England
来源：
ADVANCED ENGINEERING MATERIALS | 2020年 / 22卷 / 03期
关键词：
high-pressure torsion; recrystallization; self-annealing; softening; ultrafine grains; SEVERE PLASTIC-DEFORMATION; STACKING-FAULT ENERGY; MICROSTRUCTURAL EVOLUTION; ALUMINUM-ALLOY; PURE ALUMINUM; MECHANICAL-PROPERTIES; HARDNESS HOMOGENEITY; FCC METALS; MICROHARDNESS; HPT;
D O I：
10.1002/adem.201901015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrafine-grained copper samples produced by high-pressure torsion are stored at room temperature for 12 months to investigate microstructural stability and the self-annealing phenomena. The results show that samples processed by low numbers of turns exhibit less thermal stability after storage for 12 months in comparison with samples processed by high numbers of turns. A significant decrease in the hardness is recorded near the edges of the discs processed by 1/4, 1/2, and 1 turn due to recrystallization and grain growth, whereas a minor drop in hardness values is observed in the samples processed by 3, 5, and 10 turns. This drop in hardness is related to a recovery mechanism.
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页数：12
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