| Fe-Mn-Ge合金弹性模量反常与相变的研究 |
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| 引用本文： | 姜海昌,覃作祥,陆兴,张彦生.Fe-Mn-Ge合金弹性模量反常与相变的研究[J].大连铁道学院学报,2003,24(3):84-86,90. |
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| 作者姓名： | 姜海昌 覃作祥 陆兴 张彦生 |
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| 作者单位： | 大连铁道学院材料科学与工程系，大连铁道学院材料科学与工程系，大连铁道学院材料科学与工程系，大连铁道学院材料科学与工程系 辽宁 大连 116028，辽宁 大连 116028，辽宁 大连 116028，辽宁 大连 116028 |
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| 基金项目： | 国家自然科学基金(59901002)，辽宁省教育厅高等学校科学研究项目(20131038) |
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| 摘 要： | 利用声频共振方法测量了Fe—Mn—Ge合金的杨氏模量与温度之间的关系，顺磁-反铁磁性转变导致合金出现明显的弹性模量反常，产生模量软化。Ge降低Fe—Mn合金的弹性模量E和尼尔转变温度TN，增大△E值，并使TN以下的弹性模量温度系数βE由负变正，γ ε两相组织有利于获得较小的风值恒弹性合金，以E-T曲线确定的合金相变温度与以磁化率、电阻率、膨胀率确定的相变温度基本吻合，用弹性模量方法能准确地测定出合金马氏体相变点和磁性转变点。
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| 关 键 词： | Fe-Mn-Ge合金 弹性模量反常 杨氏模量 温度 马氏体相变 顺磁-反铁磁性转变 铁-锰-锗合金 |
Study of Abnormal Change of Young's Modulus and Phase Transformation in Fe-Mn-Ge Alloys |
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| JIANG Hai-chang,QIN Zuo-xiang,LU Xing,ZHANG Yan-sheng.Study of Abnormal Change of Young''''s Modulus and Phase Transformation in Fe-Mn-Ge Alloys[J].Journal of Dalian Railway Institute,2003,24(3):84-86,90. |
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| Authors: | JIANG Hai-chang QIN Zuo-xiang LU Xing ZHANG Yan-sheng |
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| Abstract: | The change of young's modulus VS. temperature in Fe-Mn-Ge alloys is studied by a resonance method of free-free transverse vibration at a frequency between 1000-1200 Hz. The young's modulus is small when the alloy changes from paramagnetic to antiferromagnetic state. The values of young's modulus values and the Neel temperature ( TN) are lowed by addition of Ge to Fe-24Mn alloy, while the AE values are increased. The temperature coefficients of young's modulus are changed from negative to positive with increasing the content of Ge. The Elinvar effect is shown in a y+e state. The TN, Ms As determined by young's modulus method are in agreement with those tested by electrical resistivity and expansion methods. |
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| Keywords: | Fe-Mn-Ge alloys Young's modulus antiferromagnetic transition martensitic transformation |
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