Fracture Behavior of Ultrafine-Grained Titanium Under Tension at Elevated Temperatures

被引：2
作者：
Sajadifar, S., V [1 ,2 ]
Maier, H. J. [3 ]
Niendorf, T. [2 ]
Yapici, G. G. [1 ]
机构：
[1] Ozyegin Univ, Dept Mech Engn, Istanbul, Turkey
[2] Univ Kassel, Inst Werkstofftech Mat Engn, D-34125 Kassel, Germany
[3] Leibniz Univ Hannover, Inst Werkstoffkunde Mat Sci, D-30823 Hannover, Germany
来源：
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 2020年 / 142卷 / 04期
基金：
欧盟第七框架计划;
关键词：
titanium; ECAE; ECAP; severe plastic deformation; mechanical behavior; dynamic recrystallization; fracture morphology; fracture; materials processing; microstructure property relationships; plastic behavior; SEVERE PLASTIC-DEFORMATION; STRAIN-RATE SENSITIVITY; INTERSTITIAL-FREE STEEL; MECHANICAL-BEHAVIOR; PURE TITANIUM; MICROSTRUCTURAL EVOLUTION; HOT DEFORMATION; MAGNESIUM; DUCTILITY; ALLOY;
D O I：
10.1115/1.4047747
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This investigation focused on the deformation response and microstructural changes of severely deformed titanium during post-severe plastic deformation tension, at temperatures of 300-600 degrees C and at strain rates of 0.001-0.1 s(-1). The obtained results suggest that SPD enhances the strength of grade 4 titanium up to 500 degrees C. At above 600 degrees C, the severely deformed microstructure showed comprehensive recovery. Severely deformed titanium was seen to be highly sensitive to the deformation rate, where strain rate sensitivity increased with the increase of test temperature. Analysis of fracture surfaces reveals that at elevated temperatures, growth of dimples and void coalescence occurs due to the enhanced diffusion rate and occurrence of recrystallized grains.
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页数：9
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