Paper Title:
Nature of Formation of the Areas Having an Ultrafine Grain Structure in Al-Li-Mg System Alloys
  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, quenched and aged conditions, using the methods of optical metallography, transmission electron microscopy and X-ray examination. An existence of areas, having fine grains (20-30 nm)- "Ultrafine Grain areas"(UFGA) was observed in all the investigated conditions. UFGA are located on the boundaries, sub boundaries and S1(Al2MgLi) phase particles. UFGA can also form near the particles of crystallization origin. These areas have a complex phase composition. Inside the UFGA the particles of S1(Al2MgLi) phase and also δnon-phase, investigated in [1] are always present whereas δ'(Al3Li) precipitations are absent. These areas are formed during crystallization and hot deformation. Their composition changes during the treatment. The nature of these changes is considered.

  Info
Periodical
Materials Science Forum (Volumes 519-521)
Edited by
W.J. Poole, M.A. Wells and D.J. Lloyd
Pages
265-270
DOI
10.4028/www.scientific.net/MSF.519-521.265
Citation
A.A. Alekseev, O.A. Setjukov, E.A. Lukina, I.N. Fridlyander, "Nature of Formation of the Areas Having an Ultrafine Grain Structure in Al-Li-Mg System Alloys", Materials Science Forum, Vols. 519-521, pp. 265-270, 2006
Online since
July 2006
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: Xiao Zhen Hua, Xin Yuan Peng, Xian Liang Zhou, Qing Jun Chen
Abstract:Effects of hydrogen on machinability involving cutting force, surface roughness and chips morphology of BT25y alloy with semi finish...
385
Authors: Qi Fan, Yi Ping Chen, Dong Hai Cheng
Chapter 3: Materials and Chemical Technologies
Abstract:Three-phase secondary rectification spot welding machine had been adopted to join 5A90 Aluminum-lithium alloy with a thickness of 2 mm, at...
288
Authors: Zhen Yi, Li Chen, En Guang He, Ming Chang
Chapter 9: Materials Processing Technology and Applied Research
Abstract:2A97 Al-Li alloy with good comprehensive performance is a new type of Al-Li alloys in our country,in order to meet the ever-increased...
677