【摘要】 采用电弧熔炼法制备了Fe81Ga19合金多晶样品,研究了不同热处理工艺对合金组织结构及磁致伸缩性能的影响。样品经过700℃、800℃和900℃保温后采用空冷、炉冷和淬火3种冷却方式。结果显示,经过不同热处理后样品的微观组织均为单相bcc结构,而磁致应变从34×10-6到94×10-6不等;当热处理温度为800℃时,淬火处理后可获得较好的磁致伸缩性能(88×10-6),而热处理温度较高(900℃)时,采用炉冷的方式可获得较好的磁致伸缩性能(94×10-6)。推测热处理方式和晶体取向对Fe81Ga19合金磁致伸缩性能有较重要的影响。更多还原

【Abstract】 Button ingots of polycrystalline Fe81Ga19 alloy are prepared by arc-melter,and the effects of different heat-treatments on their microstructure and magnetostriction are investigated.The specimens are annealed at 700℃,800℃,and 900℃,and then cooled at different speeds,i.e.quenching into ice water,air cooling,or furnace cooling.The results show that specimens after different heat-treatments all exhibit single bcc structure,but the magnetostrictions vary from 34×10-6 to 94×10-6;When the heating temperature is 800℃,good magnetostriction(88×10-6)can be obtained by quenching.On the other hand,when the specimen is heated at a higher temperature(900℃),furnace cooling is a better way to get good magnetostriction(94×10-6).It is speculated that the heat-treatment tempera-ture and the crystal orientation may be two primary factors influencing the magentostriction of Fe81Ga19 alloy.更多还原