Effect of thermal exposure on the room temperature tensile properties of Grade 2 titanium

被引:13
作者
Dobeson, Richard [1 ]
Petrazoller, Nicolas [1 ]
Dargusch, Matthew [1 ,2 ]
McDonald, Stuart [1 ,2 ]
机构
[1] Univ Queensland, Sch Mech & Min Engn, CAST Cooperat Res Ctr, Brisbane, Qld, Australia
[2] Univ Queensland, Def Mat Technol Ctr, Brisbane, Qld, Australia
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 10-11期
关键词
Titanium alloys; Mechanical characterisation; Thermomechanical processing; COMMERCIAL PURITY TITANIUM; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; ALPHA-TITANIUM; OXYGEN; COATINGS; ALLOYS; RUTILE;
D O I
10.1016/j.msea.2011.01.086
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
During exposure to the atmosphere at elevated temperature an a stabilised region develops on the surface of titanium alloys, the thickness of which is dependent on the temperature and cumulative time of exposure. In this research, samples of ASTM Grade 2 titanium were treated at a range of temperatures and times to investigate the effects of surface oxygen contamination on tensile properties. The stabilised a region that developed during the heat treatment was brittle and cracked easily after small amounts of strain, however these cracks were mostly arrested at the boundary between the transformed region and the bulk metal. The tensile strength of the heat-treated samples was compared to predicted values that assumed the transformed alpha-region did not contribute to the load bearing area. The comparison is reasonable when predicting the strength of samples treated at temperatures below the bulk alpha-beta transition temperature but has limitations when applied to higher temperatures. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:3925 / 3929
页数:5
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