Alternative TitleInfluence of Recrystallization on Phase Transformation and Texture of Ni47Ti44Nb9 Shape Memory Alloy Bar
颜莹; 金伟
Source Publication稀有金属
Abstract利用光学显微镜(OM),DSC和XRD,研究了直径19 mm Ni47Ti44Nb9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。
Other AbstractThe influences of recrystallization on phase transformation and texture of as-hot-rolled Ni47Ti44Nb9 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.
Keyword形状记忆合金 再结晶 织构 相变 Ni47Ti44Nb9棒
Indexed ByCSCD
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Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
颜莹,金伟. 再结晶对Ni(47)Ti(44)Nb9形状记忆合金棒相变和织构的影响[J]. 稀有金属,2008,32.0(004):404-408.
APA 颜莹,&金伟.(2008).再结晶对Ni(47)Ti(44)Nb9形状记忆合金棒相变和织构的影响.稀有金属,32.0(004),404-408.
MLA 颜莹,et al."再结晶对Ni(47)Ti(44)Nb9形状记忆合金棒相变和织构的影响".稀有金属 32.0.004(2008):404-408.
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