通过压缩和三点弯曲试验对加La后富Ni的NiAl合金力学性能进行了考察.结果发现,La的加入可以明显地细化合金的晶粒及改善NiAl和Ni3Al的两相分布.适量La可提高合金的室温屈服强度和塑性,但超过一定的含量,合金的塑性反而有所下降.在合金中,引入B韧化的Ni3Al对合金的塑性有利.
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