再结晶对Ni_(47)Ti_(44)Nb_9形状记忆合金棒相变和织构的影响
Influence of Recrystallization on Phase Transformation and Texture of Ni_(47)Ti_(44)Nb_9 Shape Memory Alloy Bar
查看参考文献16篇
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文摘
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利用光学显微镜（OM）,DSC和XRD,研究了直径19 mm Ni_(47)Ti_(44)Nb_9热轧棒材再结晶对相变和织构的影响,为该合金棒的实际应用提供理论依据。结果表明：热轧棒从450℃开始发生明显再结晶;从850℃/90 min真空退火棒材的中心到边缘,再结晶晶粒尺寸减小,Ms降低,马氏体转变区间变窄,热滞增大;热轧棒中形成了较强的γ丝织构,600℃/90 min退火后,γ丝织构强度稍有下降,退火温度升到850℃,丝织构明显减弱,等密度线发生漫散,形成了新的织构组分,这有利于改善棒材径向方向的恢复应变。 |
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其他语种文摘
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The influences of recrystallization on phase transformation and texture of as-hot-rolled Ni_(47)Ti_(44)Nb_9 alloy bar with a diameter of 19 mm were systematically investigated using optical microscope （OM）, differential scanning calorimetry （DSC） and X-ray diffraction （XRD） to provide theoretical basis for application of the alloy bar. The results showed that the recrystallization of the hot-rolled bar started obviously at 450 ℃, and recrystallized grain size was decreased and M, dropped. Temperature ranges of martensitic transforma-tion became narrower and thermal hystereses increased from the center to the edge of the bar vacuum annealed at 850 ℃/90 min F.C. More intensive 7 fibre texture was formed in the as-hot-rolled bar. But intensity of 7 fibre texture in the bar annealed at 600 ℃/90 min F.C was slightly decreased. When annealing temperature was 850 ℃, 7 fibre texture was markedly weakened, the diffusion of the isopycnals occurred, and new texture components were formed, which was beneficial to improving restoration strain of the bar along radial direction. |
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来源
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稀有金属
,2008,32(4):404-408 【核心库】
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关键词
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形状记忆合金
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再结晶
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织构
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相变
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Ni_(47)Ti_(44)Nb_9棒
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地址
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1.
东北大学材料物理与化学研究所, 辽宁, 沈阳, 110004
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中国科学院金属研究所, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-7076 |
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学科
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金属学与金属工艺 |
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基金
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中国核动力研究设计院核燃料及材料国家重点实验室基金
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文献收藏号
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CSCD:3386661
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