TENSILE DUCTILITY AT ROOM-TEMPERATURE IN THERMO-MECHANICALLY TREATED GAMMA+ALPHA-2 TYPE TITANIUM ALUMINIDES

被引:1
作者
HOSOMI, M
MAEDA, T
OKADA, M
机构
来源
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 1994年 / 80卷 / 05期
关键词
INTERMETALLIC COMPOUNDS; TITANIUM ALUMINIDES; TIAL; TI3AL; THERMOMECHANICAL TREATMENT; MICROSTRUCTURE CONTROL; HOT WORKING; TENSILE ELONGATION;
D O I
10.2355/tetsutohagane1955.80.5_424
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The effects of thermo-mechanical treatment on the tensile ductility at room temperature were investigated in the three binary gamma-base titanium aluminides containing different volume fraction of alpha2 phase. The tensile ductility at room temperature was improved by the formation of fine and homogenious ''duplex'' microstructure, which was optimised by the high reduction of forging and the adequate heat treatment temperature. The effect was most remarkable on the stoichiometric composition containing less alpha2 content than Ti-rich composition. In the duplex microstructure, deformation was taken upon the equi-axed gamma grains rather than the lamellar region. However, the fracture mode was still brittle even in the specimen showing the high elongation of 7.8%.
引用
收藏
页码:424 / 429
页数:6
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