研究了添加Cr对形变退火态Ti-50.8Ni形状记忆合金氧化行为及组织和相变特性的影响.结果表明,添加微量Cr后,Ti-Ni合金的再结晶温度和抗氧化能力有所降低,相变热滞增加,相变温度大幅度降低.随退火温度升高,Ti-50.8Ni合金冷却/加热时的相变类型发生由A→R→M/M→R→A型向A→R→M/M→A型再向A→M/M→A型转变(A-母相,R-R相,M-马氏体),Ti-50.8Ni-0.3Cr的相变类型发生由A→R/R→A型向A→R→M/M→R→A型再向A→R→M/M→A型再向A→M/M→A型转变.随退火温度升高,二合金的R相变温度和M相变热滞降低,M相变温度升高,R相变热滞变化不大,保持在4 ℃左右.
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