In:
Materials Science Forum, Trans Tech Publications, Ltd., Vol. 879 ( 2016-11-15), p. 2336-2341
Abstract:
The microstructure of as-extruded Al-9.8Zn-2.0Mg-1.8Cu aluminum alloy and its evolution during solution treatment were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC) analysis and electron back-scatter diffraction (EBSD). The results indicated that second phase of the as-extruded alloy mainly consisted of Mg (Zn, Cu, Al) 2 and Fe-rich phases. After solution treated at 475°C for 4h, Mg (Zn, Cu, Al) 2 phases were dissolved into the matrix, while Fe-rich phases still existed. Fe-rich phases cannot dissolve by prolonging solution time. The room temperature tensile strength gradually increased by prolonging solution time at 475 o C. The ultimate tensile strength of the alloy reached 700MPa after both single and two-step solution treatments.
Type of Medium:
Online Resource
ISSN:
1662-9752
DOI:
10.4028/www.scientific.net/MSF.879
DOI:
10.4028/www.scientific.net/MSF.879.2336
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2016
detail.hit.zdb_id:
2047372-2