| 电脉冲肝育细化CuAlNi合金的宏观组织与铸态形状记忆效应 |
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| 引用本文： | 陈庆福,王建中,等.电脉冲肝育细化CuAlNi合金的宏观组织与铸态形状记忆效应[J].材料科学与工艺,2001,9(3):240-242. |
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| 作者姓名： | 陈庆福 王建中 |
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| 作者单位： | [1]哈尔滨工业大学材料科学与工程学院，黑龙江哈尔滨150001 [2]辽宁工学院材料与化学工程学系，辽宁锦州121001 |
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| 基金项目： | 辽宁省自然科学基金，00101055， |
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| 摘 要： | 为细化晶粒和改善组织，用电脉冲孕育技术制备了CuAlNi记忆多晶合金，对未孕育和孕育处理合金的宏观组织进行了分析，测试了未孕育和孕育合金铸态形状记忆效应。结果表明：电脉冲处理使多晶CuAlNi合金铸锭的宏观组织得到明显改善，几乎由完全的等轴晶区构成，铸锭集中缩孔大大减小，合金的晶粒尺寸显著细化，脉冲孕育电压，频率，脉冲施加时间和铸模种类是影响孕育效果的因素，电脉冲孕育处理后材料铸态的形状记忆效应得到明显提高。
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| 关 键 词： | 电脉冲 细化 CuAlNi合金 宏观组织 形状记忆效应 铸态 铜铝镍形状记忆合金 |
| 文章编号： | 1005-0299(2001)03-0240-03 |
| 修稿时间： | 2001年3月15日 |
Macrostructures and shape memory effect of cast-state electropulse modified Cu-Al-Ni alloys |
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| CHEN Qing fu ,WANG Jian zhong ,CAI Wei ,ZHAO Lian cheng.Macrostructures and shape memory effect of cast-state electropulse modified Cu-Al-Ni alloys[J].Materials Science and Technology,2001,9(3):240-242. |
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| Authors: | CHEN Qing fu WANG Jian zhong CAI Wei ZHAO Lian cheng |
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| Affiliation: | CHEN Qing fu 1,2,WANG Jian zhong 1,2,CAI Wei 1,ZHAO Lian cheng 1 |
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| Abstract: | Electropulse modification (EPM) techniques were used in the fabrication of CuAlNi shape memory polycrystalline alloy in order to improve the microstructure and to refine the grain size. Macrostructure analysis on the unmodified and modified ingots was made, and the relevant shape memory effect of unmodified and modified ingots were tested. The grain size of polycrystalline CuAlNi alloys is significantly reduced by EPM and the macrostructure is improved distinctly, nearly full equiaxed region of the ingot is obtained and the corresponding concentrated shrink is reduced. The EPM voltage, frequency, time and the type of cast mold are the influencing factors of modification. The shape memory effect of the alloy is enhanced greatly by EPM. |
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| Keywords: | Electropulsing modification grain size refinement Cu-Al-Ni alloy macrostructure shape memory |
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