摘要
用热重分析仪、X射线衍射仪和拉伸试验研究了退火温度、变形温度对Ti-50.1Ni形状记忆(SME)合金丝的相变、形变的影响。Ti-50.1Ni合金加热氧化过程中温度超过600℃后氧化加剧,故退火温度不宜超过600℃。该合金奥氏体相变开始温度(As)高于室温,室温相为马氏体,呈SME特性。350~600℃退火态Ti-50.1Ni合金在室温下均呈SME。
Effects of annealing and deforming temperatures on the transformation and deformation of Ti-50.1Ni shape memory alloy have been investigated by means of thermal gravity,X-ray diffraction and tensile test.Oxidation become serious above 600 ℃ in the process of heating for Ti-50.1Ni,therefore,annealing temperature should be below 600 ℃.Since austenitic transformation start temperatures(As) is above room temperature,the phase at the room temperature is martensitic phase,the Ti-50.1Ni alloy shows shape memory effect(SME).The SME property can be obtained at room temperature for the Ti-50.1Ni alloy annealed at 350-600 ℃.
引文
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