中文摘要：

研究了Ni33Al28Cr5.5Mo0.5Hf合金在900℃10T强磁场处理后的微观组织及室温力学性能，发现合金经强磁场处理后室温抗弯强度提高约75％，抗拉强度提高1倍多。强磁场处理使合金中Hf元素在NiAl/Cr（mo）相界处析出的块状Heusler相部分溶解，弥散分布在Cr（Mo）相界处的小颗粒几乎全部固溶至NiAl相基体。Heusler相在晶界处析出可能是导致合金室温强度低、韧性差的主要原因，强磁场处理改善了这一情形，使合金固溶强化加强，提高其力学性能。

英文摘要：

The microstructure and mechanical property of the Ni33Al28Cr5.5Mo0.5Hf alloys, treated under temperature 900℃ with a 10 T strong magnetic field, were studied in the present paper. After strong magnetic field treatment, it is found that the room temperature bending strength and tensile strength of the alloys are increased by 75% and 100%, respectively. Electron probe microanalysis shows that the Heusler phases at NiAl/Cr（Mo） grain boundaries are partially dissolved, and the small Heusler phases particles at Cr（Mo） and matrix phases interfaces almost dissolved into NiAl matrix. It is supposed that the Heusler phase solution resulting from the strong magnetic field treatment improves the mechanical property of the NiAl intermetallic alloy.