Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1638145 | Transactions of Nonferrous Metals Society of China | 2013 | 8 Pages |
Abstract
The effects of heat treatment on the microstructure and mechanical properties of ZA27 alloy were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and mechanical characterization. The results indicated that the as-cast microstructure of the alloy was mainly composed of α, decomposed β, η and É phases. After solid solution treatment at 365 °C for 1 h, α and η phases dissolved, and the microstructure of specimen was mainly composed of the supersaturated β phases. The phase decomposition of supersaturated ZA27 alloy is a two-stage phase transformation: the decomposition of the supersaturated β phase at the early stage of aging, and with the increase of aging time, É phase decomposition through a four-phase transformation: α+ÉâT â²+ η. A good combination of high tensile elongation and reasonable strength can be achieved by suitable heat treatments.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yang LIU, Hong-ying LI, Hao-fan JIANG, Xiao-chao LU,