以NiTiHf和NiAl系合金为例,论述了开发高温形状记忆合金(SMA)时应考虑的因素.这些因素包括材料的可加工性、相稳定性、机械稳定性和经济性.NiTiHf和NiAl系合金的相变温度在150℃以上,具有发展成为高温SMA的潜力.但要使这些合金成为实用高温SMA,还需要做进一步的研究工作.如NiTiHf合金的相稳定性和机械稳定性尚未完全弄清;NiAl系合金的可加工性和相稳定性需进一步改善,其机械稳定性和作为SMA的加工价格亦不清楚,需进一步研究.
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