ORIENTATION AND TEMPERATURE-DEPENDENCE OF YIELD STRESS AND SLIP GEOMETRY OF TI3AL AND TI3AL-V SINGLE-CRYSTALS

被引：100

作者：

UMAKOSHI, Y

NAKANO, T

TAKENAKA, T

SUMIMOTO, K

YAMANE, T

机构：

[1] Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, Suita, Osaka, 565, 2-1, Yamada-Oka

来源：

ACTA METALLURGICA ET MATERIALIA | 1993年 / 41卷 / 04期

关键词：

D O I：

10.1016/0956-7151(93)90162-L

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystals of binary Ti3Al and ternary Ti3Al-V alloys with the D0(19) structure were deformed in compression at 20-900-degrees-C. Slip systems of the {1010BAR}[1210BAR]-type and the {1121BAR}[1126BAR]-type were observed in these alloys throughout the entire temperature range depending on orientation, but the {1121BAR}[1126BAR]-slip was limited to orientations near [0001]. The basal (0001)[1210BAR]-slip was also activated in quenched Ti3Al. The CRSS for the {1010BAR}[1210BAR]-slip in the binary and ternary alloys decreases monotonically with increasing temperature. In the ternary alloy the CRSS for the {1010BAR}[1210BAR]-slip shows a violation of Schmid's law, while the binary alloy obeys the CRSS law. When Ti3Al is deformed by {1121BAR}[1126BAR]-slip the CRSS for the slip exhibits an anomalous peak in the temperature-CRSS curve but the addition of vanadium suppresses the extent of the anomalous strengthening.

引用

页码：1149 / 1154

页数：6

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