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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.2; Jul 7-11, 2003; Leganes, Madrid, Spain >The Investigation of Superplasticity in NiAl intermetallic Compounds
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The Investigation of Superplasticity in NiAl intermetallic Compounds

机译：NiAl金属间化合物的超塑性研究

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摘要

In the present paper, superplastic deformation behaviors and mechanisms of NiAl intermetallic compounds under tensile stress states were investigated. It showed that NiAl and NiAl based alloys in which exhibited Superplasticity were prepared by either conventional casting or directional solidification. These alloys could be divided into three categories depending on the type of microstructure: multiphase equiaxed structure (NiAl―9Mo, NiAl―25Cr, NiAl―20.4Fe―Y.Ce, NiAl―30Fe―Y), single-phase equiaxed structure (NiAl) and columnar structure (DS NiAl―27Fe―3Nb, DS NiAl―15Cr, DS NiAl―5Mo―0.5Hf) and the corresponding deformation mechanisms were grain boundary sliding accompanied with dynamic recovery (GBS+DR), dynamic recovery and recrystallization (DRX) and intragrain dislocation slip (IDS), respectively.
机译：本文研究了NiAl金属间化合物在拉伸应力状态下的超塑性变形行为及其机理。结果表明，通过常规铸造或定向凝固可以制备出具有超塑性的NiAl和NiAl基合金。根据显微组织的类型，这些合金可分为三类：多相等轴结构（NiAl―9Mo，NiAl―25Cr，NiAl―20.4Fe―Y.Ce，NiAl―30Fe―Y），单相等轴结构（NiAl）。 ）和柱状结构（DS NiAl―27Fe―3Nb，DS NiAl―15Cr，DS NiAl―5Mo―0.5Hf）以及相应的变形机制是晶界滑动并伴有动态回复（GBS + DR），动态回复和再结晶（DRX） ）和晶粒内脱位滑移（IDS）。

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