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Fe83Ga17Tby合金組織結(jié)構(gòu)及磁致伸縮性能
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內(nèi)蒙古自然科學(xué)基金（20080404MS0802）


Damage Behavior of Crater and Microstructure Evolution of Ti-6Al-4V Alloy
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    摘要:

    研究了Fe83Ga17Tby (y=0, 0.2, 0.4, 0.6, 0.8)合金的顯微組織結(jié)構(gòu)和磁致伸縮性能。XRD顯示：Fe83Ga17Tby鑄態(tài)合金以A2相為主，有少量DO3、DO19 和L12相；L12 和DO3相隨鋱含量的增加而增加，鋱促進了Fe83Ga17合金(200)織構(gòu)的形成；背散射電子像及能譜點分析顯示合金加入鋱后，晶粒從等軸晶轉(zhuǎn)變?yōu)橹鶢罹?，鋱富集于晶界。鋱?zhí)砑訉?dǎo)致Fe83Ga17磁致伸縮性能增加，其最佳添加量是0.2 at%，F(xiàn)e83Ga17Tb0.2在低場下磁致伸縮系數(shù)可達1.5×10-4；鋱的外層電子影響自旋-軌道耦合，可能是導(dǎo)致磁致伸縮性能增加的原因

    Abstract:

    The microstructure and magnetostriction of Fe83Ga17Tby (y=0, 0.2, 0.4, 0.6, 0.8) alloys were investigated. Results show that the cast alloys are mainly composed of A2 phase with a little L12, DO3 and DO19 phase. L12 phase and DO3 increase with the increasing of Tb content in Fe83Ga17Tby alloys; ternary additions of Tb element have conduced to the formation of (200) texture from the binary Fe-Ga alloy; equiaxed grains change into columnar grains and Tb grain boundary enrichment are observed by backscattering electron images and point analysis in the ternary alloys of Tb addition. Magnetostriction is strengthened by accession of Tb. The most felicitous Tb addition is 0.2at%, and Fe83Ga17Tb0.2 can produce magnetostrictive strain of 1.5×10-4 in low field. Spin-orbit coupling is affected by outer shell electron which might result in magnetostriction enhancement

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龔 沛,江麗萍,趙增祺,吳雙霞. Fe83Ga17Tby合金組織結(jié)構(gòu)及磁致伸縮性能[J].稀有金屬材料與工程,2013,42(10):2139~2143.[Gong Pei, Jiang Liping, Zhao Zengqi, Wu Shuangxia. Damage Behavior of Crater and Microstructure Evolution of Ti-6Al-4V Alloy[J]. Rare Metal Materials and Engineering,2013,42(10):2139~2143.]
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  • 收稿日期:2012-11-01
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