EFFECT OF NITROGEN ADDITION ON THE MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF CAST GAMMA-TITANIUM ALUMINIDE ALLOYS

被引：14

作者：

YUKI, I ^{[1
]}

AMANO, N ^{[1
]}

UOZUMI, M ^{[1
]}

INUI, H ^{[1
]}

YAMAGUCHI, M ^{[1
]}

机构：

[1] KYOTO UNIV, FAC ENGN, SAKYO KU, KYOTO 606, JAPAN

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 1994年 / 58卷 / 05期

关键词：

TITANIUM ALUMINIDE; NITROGEN; NITRIDE; MICROSTRUCTURE; GRAIN SIZE; MECHANICAL PROPERTIES; TENSILE STRENGTH; VICKERS HARDNESS;

D O I：

10.2320/jinstmet1952.58.5_564

中图分类号：

学科分类号：

摘要：

Ti-(30 approximately 38 mass%) Al-(0 approximately 1 mass%) N alloys prepared by a precision casting method were investigated. The addition of nitrogen was found to be effective in refining TiAl/TiAl lamellar grains. Two-phase nitride particles composed of TiN as a core and Ti2AlN as an outer shell, together with fine precipitates of Ti3AlN, were identified in the present alloys containing nitrogen. The room-temperature ductility and strength increased with increasing nitrigen content up to about 0.3 mass%N, while they were decreased by further addition of nitrogen. The improvement in the room-temperature mechanical properties is mainly caused by grain refining and precipitation hardening.

引用

页码：564 / 570

页数：7

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