Preparation of CuAlNi Shape Memory Alloy in Directional Solidification

Xu Guangji Yang Shaofeng Ding Yutian Yang Xiaotian WT

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Preparation of CuAlNi Shape Memory Alloy in Directional Solidification
Issue 4, Pages: 249-251(2005)
Published： 2005 ，
DOI：

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[1]许广济,杨少锋,丁雨田,杨效田.定向凝固制备CuAlNi形状记忆合金的研究[J].特种铸造及有色合金,2005(04):249-251+192.

Xu Guangji Yang Shaofeng Ding Yutian Yang Xiaotian WT. Preparation of CuAlNi Shape Memory Alloy in Directional Solidification. [J]. Special Casting & Nonferrous Alloys (4):249-251(2005)
[1]许广济,杨少锋,丁雨田,杨效田.定向凝固制备CuAlNi形状记忆合金的研究[J].特种铸造及有色合金,2005(04):249-251+192. DOI：

Xu Guangji Yang Shaofeng Ding Yutian Yang Xiaotian WT. Preparation of CuAlNi Shape Memory Alloy in Directional Solidification. [J]. Special Casting & Nonferrous Alloys (4):249-251(2005) DOI：

摘要

利用定向凝固设备

经过母合金的二次熔炼

可制备出具有柱状组织的CuAlNi形状记忆合金

并找到了在该试验装备下的最佳工艺参数。通过化学成分分析、DSC分析

得到该合金的成分及相变点

金相观察可以看到典型的柱状晶

记忆性试验比较了单晶、普通铸造、定向凝固组织的循环疲劳次数;分析了具有柱状组织的CuAlNi合金记忆性提高的原因。定向凝固组织可提高塑性加工性能、记忆稳定性、冷热循环次数

消除纵向晶界。

Abstract

The CuAlNi memory alloy with column structure can be prepared through the remelting of the primary alloy using directional solidification dev ice and the optimized processing parameters can be obtained.The composition and transformation temperature points can be obtained by chemical ingredients and DS C analysis and the typical column structure can be obvesrved by OM.The memories of the alloy in single crystal

conventional casting and directional solidificati on were compared by measuring cycling fatigure period.The reason resulting in th e increase of memory of CuAlNi alloy with column structure was approached.It was found that directional solidification can improve the workability and memory s tready and cold-heat cycling period and eliminate the longitudinal crystal boun dary of the alloy.