Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K

被引：13
|
作者：
Yamabe-Mitarai, Y [1 ]
Gu, Y [1 ]
Harada, H [1 ]
机构：
[1] Natl Inst Mat Sci, Ibaraki 3050047, Japan
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2003年 / 34A卷 / 10期
关键词：
D O I：
10.1007/s11661-003-0284-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and strength at 1473 and 2073 K and creep properties at 2073 K were investigated in three Ir-Nb-Zr alloys with the fee and L1(2) two-phase structure. The microstructure and lattice misfit were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffractometry (XRD). Compression and creep tests were performed, and their deformation structures were observed using SEM and TEM. At 1473 K, the strength of the Ir-Nb-Zr alloys was higher than that of the binary Ir-Nb and Ir-Zr alloys, but they were almost equivalent at 2073 K. However, the ternary alloys showed great improvement on creep at 2073 K. The time for the 2 pct creep strain of the Ir-Nb-Zr alloy was about 100 hours, while it was I hour for the binary alloys. The deformation mechanisms for compressive strength and creep resistance in these Ir-Nb-Zr alloys are discussed in terms of the deformation structure.
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收藏
页码：2207 / 2215
页数：9
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