Paper Title:
Thermal Stability and Mechanical Properties of Nanocrystalline L12 Al3Hf and (Al+12.5 at.%Zn)3Hf Prepared by MA and SPS
  Abstract

Thermal stability and mechanical properties of L12 Al3Hf and (Al+12.5 at.%Zn))3Hf synthesized by mechanical alloying(MA) and spark plasma sintering(SPS) were investigated. Nanocrystalline L12 phase was produced after MA for 8 and 10 hrs in Al3Hf and (Al+12.5 at.%Zn))3Hf powders, respectively. The grain sizes were reduced to about 10 nm in both systems after MA for 20 hrs. After SPS, L12 phase was maintained only in Zn added system. In (Al+12.5 at.%Zn))3Hf, L12 to D023 phase transformation was started at about 850°C and finished at about 1150°C Microhardness was decreased with increasing the annealing temperature while fracture toughness was increased due to the grain growth. Fracture toughness of (Al+12.5 at.%Zn))3Hf was greater than that of Al3Hf in all annealing temperatures. Fracture toughness of (Al+12.5 at.%Zn))3Hf after annealing at 1200°C was about 5.38 MPam1/2.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
809-812
DOI
10.4028/www.scientific.net/MSF.449-452.809
Citation
C. W. Kang, H. S. Jang, S. J. Kim, "Thermal Stability and Mechanical Properties of Nanocrystalline L12 Al3Hf and (Al+12.5 at.%Zn)3Hf Prepared by MA and SPS", Materials Science Forum, Vols. 449-452, pp. 809-812, 2004
Online since
March 2004
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: Tadeusz Kulik, Jarosław Ferenc, Aleksandra Kolano-Burian, Maciej Kowalczyk
747
Authors: Wan Li Zhang, Hong Chuan Jiang, Bin Peng, Wen Xu Zhang, Shi Qing Yang
Abstract:In this paper, the influences of annealing temperature on TbFe magnetostrictive film magnetic and magnetostrictive characteristics were...
3741
Authors: Z. Stokłosa, G. Badura, P. Kwapuliński, Józef Rasek, G. Haneczok, Józef Lelątko, Lucjan Pająk
Abstract:The crystallization and optimization of magnetic properties effects in FeXSiB (X=Cu, V, Co, Zr, Nb) amorphous alloys were studied by...
171
Authors: Sergey Kozyukhin, Alexey A. Sherchenkov
Abstract:Phase change memory materials of Ge-Sb-Te system [(GeTe)m(Sb2Te3)n (m : n = 1:1; 1:2; 2:1)] were studied during thermal cycling by...
22
Authors: N.I. Vlasova, V.S. Gaviko, A.G. Popov, N.N. Shchegoleva, L.A. Stashkova, Dmitriy Gunderov, Xavier Sauvage
Abstract:Equiatomic FePd alloy in the ordered state has been processed by means of high-pressure torsion deformation (HPTD) and then annealed. X-ray...
392