Effect of Ta content on martensitic transformation behavior of RuTa ultrahigh temperature shape memory alloys
Effect of Ta content on martensitic transformation behavior of RuTa ultrahigh temperature shape memory alloys
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DOI：
10.1016/s0921-5093(02)00641-x
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发表时间：
2003-05
期刊：
影响因子：
6.4
通讯作者：
Zhi-rong He;Jing-en Zhou;Y. Furuya
中科院分区：
文献类型：
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作者：
Zhi-rong He;Jing-en Zhou;Y. Furuya
Ta含量对Ru 100 −xTax（x=46-54 at.%）马氏体相变（MT）行为的影响合金已通过差示扫描量热法、膨胀法、X射线衍射和光学显微镜进行了研究。Ta含量显著影响RuTa合金的MT行为。当Ta含量小于49 at.%时，贫Ta的RuTa合金中出现了一阶段的可逆MT。在近等原子比的RuTa合金中发生两阶段的可逆相变。Ta含量大于52 at.%的富Ta合金中没有观察到可保留的MT Ta.随着Ta含量的增加，RuTa合金的MT温度和滞后降低。时效和热循环过程对合金的MT行为几乎没有影响。RuTa合金的变形方式为孪生。在这些RuTa合金中，Ru 50 Ta 50合金的MT性能最好。
Effects of Ta content on martensitic transformation (MT) behavior of Ru100−xTax(x=46–54 at.%) alloys have been investigated by differential scanning calorimetry, dilatometry, X-ray diffraction and optical microscopy. Ta content significantly affects the MT behavior of RuTa alloys. The one-stage reservible MT occurs in Ta-poor RuTa alloys with Ta content less than 49 at.%. The two-stage reservible MT takes place in near-equiatomic RuTa alloys. No reservible MT is observed in Ta-rich alloys with Ta content more then 52 at.% Ta. The MT temperatures and hysteresis of RuTa alloys decrease with increasing Ta content. The aged and thermal cycled processes are nearly no effect on the MT behavior of these alloys. The deforming way of RuTa alloys is twinning. The Ru50Ta50alloy is of the most excellent MT behavior among these RuTa alloys.