摘要
通过热轧和冷轧工艺制备了0．2mm厚的Co41Ni33Al26合金带材，采用1350℃×5h水冷对该带材进行了淬火热处理，用金相显微镜观察了其组织。用微分差热分析仪（DSC）测定了其马氏体转变温度，并用动态热机械谱仪（DMS）研究了其相变及阻尼能力。结果表明，0．2mm的Co41Ni33Al26合金带材的基体为竹节状的粗大再结晶晶粒，其马氏体相变温度比1．5mm厚的板材高约45℃；降温过程中合金带材在140～25℃温度范围出现阻尼峰，其阻尼峰宽明显大于马氏体相变温度范围，后者为121-78℃，表明有新的应力诱发马氏体相变出现；Co41Ni33Al27合金带材的阻尼能力超过O．04，并且温度范围宽，有望成为新型阻尼材料。
Abstract： Co41Ni33Al26 alloy ribbons with a thickness about 0.2mm were fabricated by hot rolling and cold rolling processes. After heattreated at 1350℃ for 5 hours and then water quenched, the structure of the ribbons matrix phase converted to bamboo- liked reerystallized large grains. Martensitic transformation and damping capacity of Co41Ni33Al26 alloy ribbons were investigated by means of differential scanning calorimetry （DSC） and dynamic mechanical spectroscopy （DMS） separately. It was found that the martensitic transformation temperature of 0.2mm thickness ribbons is about 45℃ higher than that of 1.5mm thickness plate. During cooling process, there is a damping peak appearing at the temperature from 140℃ to 25℃ which is obviously wider than its martensitic transformation temperature （121- 78℃ ） measured by means of DSC. It is suggestsed that some stress-induced martensitic transformations took place. The damping capacity of Co41Ni33Al26 alloy ribbon is over 0.04 corresponding to a wide temperature range, indicating that the alloy is a new kind of promising damping material.
出处
《材料开发与应用》
CAS
2006年第2期9-13,23,共6页
Development and Application of Materials
基金
教育部新世纪优秀人才支持计划(NCET-04-0752)
