Effect of Lanthanum on the Heat Capacity and Changes in Thermodynamic Functions of AlMg5.5Li2.1Zr0.15 Duralumin-Type Aluminum Alloy

被引:0
作者
I. N. Ganiev [1 ]
S. S. Savdulloeva [1 ]
S. U. Khudoiberdizoda [2 ]
机构
[1] Nikitin Institute of Chemistry, Academy of Sciences of Tajikistan, Dushanbe
[2] Tajik State University, Dushanbe
关键词
AlMg5.5Li2.1Zr0.15 duralumin-type aluminum alloy; enthalpy; entropy; Gibbs energy; heat capacity; heat transfer coefficient; lanthanum;
D O I
10.1134/S0020168525700074
中图分类号
学科分类号
摘要
Abstract—: The specific heat of lanthanum-containing AlMg5.5Li2.1Zr0.15 duralumin-type aluminum alloy has been measured during cooling in the range 300–800 K. We have derived polynomials representing the cooling rates of the lanthanum-containing alloys and a reference. Based on the experimentally determined cooling rates of the alloys and reference and their weights, we have obtained cubic polynomials for the temperature dependence of the specific heat. Using integrals of the specific heat, we derived polynomials for the temperature dependences of enthalpy, entropy, and Gibbs energy changes. The results demonstrate that, with increasing temperature, the specific heat, enthalpy, and entropy of the alloys decrease, whereas their Gibbs energy decreases. The lanthanum content of the alloys has the opposite effect. © Pleiades Publishing, Ltd. 2024.
引用
收藏
页码:1367 / 1373
页数:6
相关论文
共 15 条
  • [1] Alieva S.G., Alt'man M.B., Ambartsumyan S.M., Promyshlennye alyuminievye splavy (Industrial Aluminum Alloys), (1984)
  • [2] Fridlyander I.N., Vysokoprochnye deformiruemye alyuminievye splavy (High-Strength Wrought Aluminum Alloys), (1960)
  • [3] Filatov Y., Al–Mg–Sc alloys as a distinct group of wrought aluminum alloys, Tekhnol. Legkikh Splavov, 2, pp. 34-41, (2014)
  • [4] Ismailov N., Ibragimov K., Preparation of low-alloyed aluminum alloy for electrical engineering, Usp. Sovrem. Nauki, 1, pp. 236-240, (2017)
  • [5] Gureeva M.A., Ovchinnikov V.V., Manakov I.N., Metallovedenie: Makro- i mikrostruktury liteinykh alyuminievykh splavov: uchebnoe posobie dlya vuzov (Metal Technology: Macro- and Microstructures of Cast Aluminum Alloys—A Learning Guide for Higher Education Institutions), (2024)
  • [6] Bagnitskii V.E., Obratnye svyazi v fizicheskikh yavleniyakh, Feedback in Physical Phenomena), (2014)
  • [7] Bodryakov V., Correlation of temperature dependencies of thermal expansion and heat capacity of refractory metal up to the melting point: molybdenum, High Temp, 52, pp. 840-845, (2014)
  • [8] Gafner Y., Gafner S.L., Zamulin I.S., Redel' L.V., Baidyshev V.S., Analysis of the heat capacity of nanoclusters of FCC metals on the example of Al, Ni, Cu, Pd, and Au, Phys. Met. Metallogr, 116, pp. 568-565, (2015)
  • [9] Menliev S., Gullyeva A., Spiridonov A., Heat capacity measurements for metals during heating and cooling, Sbornik nauchnykh trudov studentov (A Collection of Scientific Works by Students), pp. 119-121, (2020)
  • [10] Nizomov Z., Saidov R., Akramov M.B., Avezov Z.I., Mirzoev F.M., Thermal properties of Zn5Al and Zn55Al alloys with IIa group elements, Key Eng. Mater, 909, pp. 76-84, (2022)