Influence of Magnesium and Copper Additions on the Low Temperature Thermal Stability of Al-Li Alloys

机译：镁和铜的添加对Al-Li合金低温热稳定性的影响

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Separate magnesium and copper additions have been made to a base Al-1.7 wt% Li alloyrnto investigate their effect on the low temperature stability (70℃) of the microstructurernwhen in the lightly-aged condition. Increasing concentrations of magnesium and copperrnproduce increasing instability by encouraging larger volume fractions of δ' phase to formrnduring exposure. This enhanced δ' formation is accompanied by an increase in proofrnstress and a decrease in fracture energy, the effect being larger in Al1.7LiXCu alloys thanrnin Al1.7LiXMg alloys. Changes in the δ' volume fraction are the result of a shift in the α/δ'solvus boundary in Al1.7LiXMg alloys, and heterogeneous nucleation of δ' on Gpcu zonesrnin the case of Al1.7LiXCu alloys.

机译：研究了在轻度老化条件下，分别对Al-1.7 wt％Li基合金中分别添加了镁和铜，以研究它们对显微组织的低温稳定性（70℃）的影响。镁和铜的浓度不断增加，会通过促使更大的δ'相体积分数在暴露过程中形成而增加不稳定性。这种增加的δ'形成伴随着拉伸应力的增加和断裂能的降低，在Al1.7LiXCu合金中，其影响要大于在Al1.7LiXMg合金中。 δ'体积分数的变化是Al1.7LiXMg合金中α/δ'固溶边界的移动以及Al1.7LiXCu合金中Gpcu带上δ'的异质成核的结果。

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来源
《Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004》|2004年|777-782|共6页
会议地点 Brisbane(AU)
作者
B. Noble; S. J. Harris; S. Katsikis; K. Dinsdale;
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作者单位

School of Mechanical, Materials, Manufacturing Engineering, University of Nottingham, Nottingham, United Kingdom;

School of Mechanical, Materials, Manufacturing Engineering, University of Nottingham, Nottingham, United Kingdom;

School of Mechanical, Materials, Manufacturing Engineering, University of Nottingham, Nottingham, United Kingdom;

School of Mechanical, Materials, Manufacturing Engineering, University of Nottingham, Nottingham, United Kingdom;

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正文语种 eng
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关键词
Al-Li-Mg; Al-Li-Cu; thermal stability; strength; toughness; DSC; electrical resistivity;

机译：铝锂镁铝锂铜;热稳定性;强度;韧性; DSC；电阻率;

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2. 铜添加对近共晶Al-Si-xCu合金的微观组织和硬度的影响 [J] . Muzaffer ZEREN, Erdem KARAKULAK, Serap GüMü 中国有色金属学报：英文版 . 2011,第008期
3. Influence of Cu addition on transformation temperatures and thermal stability of TiNiPd high temperature shape memory alloys [J] . Rehman Saif Ur, Khan Mushtaq, Khan A. Nusair, Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application . 2019,第5期

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5. Influence of Ti, Mn, Fe, and Ni addition upon thermal stability and decomposition temperature of the MgH_2 phase of alloys synthesized by reactive mechanical alloying [J] . O.G. Ershova, V.D. Dobrovolsky, Yu.M. Solonin Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2008,第1a2期

机译：Ti，Mn，Fe和Ni的添加对反应性机械合金化合金MgH_2相热稳定性和分解温度的影响
6. Influence of Magnesium and Copper Additions on the Low Temperature Thermal Stability of Al-Li Alloys [C] . International conference on aluminium alloy . 2004

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7. Role of magnesium addition on the occurrence of incipient melting in experimental and commercial aluminum-silicon-copper alloys and its influence on the alloy microstructure and tensile properties [D] . Yang, Deyu 2006

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8. Composites of aluminum alloy and magnesium alloy with graphite showing low thermal expansion and high specific thermal conductivity [O] . Valerio Oddone, Benji Boerner, Stephanie Reich 2017

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10. Low Temperature Thermally Activated Deformation Mechanisms for BCC Magnesium-Lithium-Aluminum Alloy. [R] . Abo-el-Fotch, M. O. 1967

机译：BCC镁 - 锂 - 铝合金的低温热活化变形机制。

Influence of Magnesium and Copper Additions on the Low Temperature Thermal Stability of Al-Li Alloys

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