Paper Title:
Atomic Bonding and Properties of Al-Li Alloy in Earlier Ageing Stage
  Abstract

The atomic bonding of the segregated cell of Al-Li alloy in earlier ageing condition was calculated according to the empirical electron theory (EET) in solid. The results showed that the strongest covalent bond was the Al-Al bond in the segregated cell without vacancy, while the strongest covalent bond was the Al-Li bond in the cell containing vacancy. Since the difference of electronagativity between the Al and Li atoms was obvious, it was inclined to form the Al-Li segregated cell of short range order structure in the condition of vacancy joining. The short range order structure with vacancy was probably the embryo or precursor structure of the metastable phase ' δ (Al3Li). As the ' δ (Al3Li) was coherence with matrix, the bond net strength was enhanced by the precipitation of ' δ (Al3Li) and hence the alloy was strengthened.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
819-824
DOI
10.4028/www.scientific.net/MSF.546-549.819
Citation
Y. J. Gao, Q. F. Mo, Y. L. Wang, I. Zhang, C. G. Huang, "Atomic Bonding and Properties of Al-Li Alloy in Earlier Ageing Stage", Materials Science Forum, Vols. 546-549, pp. 819-824, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: A.A. Alekseev, O.A. Setjukov, E.A. Lukina, I.N. Fridlyander
Abstract:The structure of Al-Li-Mg system alloy 1420, containing a small quantity of Sc, Zr, Ti was investigated in cast, homogenized, hot-pressed,...
265
Authors: A. Raho, Kadi-Hanifi Mouhyddine
Abstract:The influence of the cadmium and the indium on the kinetics of the δ’ metastable phase precipitation has been studied in Al-8.5at.%Li and...
479
Authors: Zhi Gang Chen, Zi Qiao Zheng, Jue Zhong, Simon P. Ringer
Abstract:The present paper outlines the effect of small addition of Sc,Ag and Mg on the ageing characteristics and microstructural evolution in some...
438
Authors: Yong Lai Chen, Jin Feng Li, Yu Wei Zhang, Zi Qiao Zheng
Abstract:An Al-3.43Cu-1.28Li-0.49Mg-0.12Zr containing 0.62Zn and 0.29Mn was designed and the microstructures and mechanical properties of the alloy...
995
Authors: Fadhlul Wafi Badrudin, Mohd Sazwan Affendi Rasiman, M.F.M. Taib, Nur Hafiz Hussin, Oskar Hasdinor Hassan, Muhd Zu Azhan Yahya
Chapter 9: Materials and Technologies in Electronics and Optoelectronics
Abstract:One of the fluorosulphate family cathode materials viz. LiFeSO4F is investigated by means of first principle calculation. The...
508