研究了稀土Tb对Ni50Mn29Ga21磁性记忆合金抗弯强度和断裂行为的影响.结果表明:稀土Tb可以显著提高材料的抗弯强度,改变断口形貌.不含稀土试样弯曲断裂后其断口主要是晶界断裂.添加稀土后,随着稀土加入量的增多,断裂方式由以晶界断裂为主转为以解理断裂为主.此外,Tb的加入,明显细化了晶粒,同时使材料的含氧量降低.
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