【摘要】 用选区电子衍射和衍衬形貌象分析相结合的方法,系统分析和研究了随炉缓冷TiNi形状记忆合金薄膜试样中,三斜结构亚稳R’相的形成条件和相变行为。结果表明,经固溶—淬火处理,并在673K以上温度时效后缓冷的TiNi合金薄膜试样中,都可能形成亚稳R’相。原位变温实验确定,升温过程中亚稳R’相在413K转变为B2结构母相,R’相转变不是一个可逆相变。更多还原

【Abstract】 Formation condition and transition behavior of metastable R′phase in TiNi shape memory alloy werestudied by selected area electron diffraction,and electron micrograph R′phase may be formed in specimenaged at temperature of 6 73K or above after solution-quenching treatment.In-situ heating experiment deter-minde that metastable R′phase changed into B2 structure matrix at 413K,and R′phase is an irreversibletransformation.更多还原