Precipitation hardening in Al-Zn-Mg-Al2O3(p) composite

Abstract

The precipitation hardening of a AI-Zn-Mg-AI203(p) composite is explored. It is found that the peak hardness achieved is almost double that of precipitation hardening of AI-Zn-Mg alloy or dispersion strengthening of AI-Zn-Mg with 5% AlzO3(P). Toughness is marginally improved and tensile strength is one and half times that of precipitation hardened AI-Zn-Mg alloys. The ageing time for peak hardness is reduced due to acceleration of formation of precipitate.

Determination of Warm Working Temperature Range for In Situ Alm–TiB2p Composite

“…The problems are atmospheric contamination and sticking friction at high temperatures and brittleness and dynamic strain ageing at low temperatures. It is better to ascertain the temperature window for working dispersion hardened composites such as Al m -TiB 2p [2][3][4][5]. Dispersion hardening is a promising route for developing high temperature materials [6].…”