摘要
利用差示扫描量热仪(DSC)、扫描电镜(SEM)和D/max2500PC全自动X射线衍射仪研究了不同时效处理制度下TiNiCr合金相变温度的变化规律。结果表明,该合金随着时效温度增加,逆马氏体相变点As、Af上升,但当时效温度高于700℃时,相变点As、Af降低。该合金在冷却过程中经历了B2→R→B19′两阶段一级相变。通过SEM和XRD衍射研究表明,该合金经时效处理产生了Ti3Ni4析出相诱发了R相变。
Transformation behavior of TiNiCr shape memory alloys with different aging treatment was investigated by DSC, scanning electron microscopy （SEM） and the D/max2500PC automatic X-ray diffraction equipment （XRD）. The results indicate that with increasing of the aging temperature, the transformation temperature As and Af increase but they decrease after 700 ℃ and TiNiCr alloy exhibits B2→R→B19＇ two-stage martensitic transformation during cooling. Lots of Ti3Ni4 precipitants from aging treatment induce R phase transformation.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第12期2147-2151,共5页
Rare Metal Materials and Engineering
基金
科技部科技型中小企业技术创新基金(09C26213201044)
江苏省科技型中小企业技术创新基金(BC2007144)
