Coherent precipitation in Ni-rich Ni-Ti single crystals

被引：0
|
作者：
Kostorz, G [1 ]
Kompatscher, M [1 ]
Schönfeld, B [1 ]
机构：
[1] ETH Zurich, Inst Phys Appl, CH-8093 Zurich, Switzerland
来源：
JAPAN INSTITUTE OF METALS, PROCEEDINGS, VOL 12, (JIMIC-3), PTS 1 AND 2: SOLID - SOLID PHASE TRANSFORMATIONS | 1999年
关键词：
precipitates; Ni-Ti alloys; small-angle scattering; coherent phases; metastable states;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The complex decomposition sequence in Ni-rich Ni-Ti alloys involves the formation of two distinguishable Ll(2)-related coherent metastable states before the stable eta phase (D0(24)) appears at sufficiently high temperatures. Related small-angle neutron scattering studies are reviewed and complemented by recent results of in-situ aging of polycrystals and single crystals at temperatures between 900 and 1240 K. The two-stage behavior of coherent decomposition is confirmed, and the formation of Ll(2)-type precipitates preceding the growth of D0(24)-type lamellae is observed even at 1240 K - above the currently suggested coherent miscibility gap.
引用
收藏
页码：305 / 312
页数：8
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