Effects of Fe Content on Microstructure and Mechanical Properties of A206 Alloy

The present paper introduces the microstructure and mechanical properties of the Al-Mg-Si-Mn alloy made by recycled materials, in which the impurity levels of iron are mainly concerned. It is found that the increased Fe content reduces the ductility and yield strength but slightly increases the UTS of the diecast alloy. The tolerable Fe content is 0.45wt.%, at which the recycled alloys are still able to produce castings with the mechanical properties of yield strength over 140MPa, UTS over 280MPa and elongation over 15%.The Fe content is steadily accumulated in the alloy with the increase of recycle times. However, after 13 cycles, the recycled alloys are still able to produce ductile alloys with satisfied mechanical properties.

Download Full-text

Effect of Fe Content on the Microstructure and Mechanical Properties of Ti-Al-Mo-V-Cr-Fe Alloys

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0160 ◽

2017 ◽

Vol 62 (2) ◽

pp. 1105-1108

Author(s):

K.C. Bae ◽

J.J. Oak ◽

Y.H. Kim ◽

Y.H. Park

Keyword(s):

Mechanical Properties ◽

Volume Fraction ◽

Alloy System ◽

Microstructure And Mechanical Properties ◽

Nucleation Sites ◽

Fe Content ◽

Significant Difference ◽

Before And After ◽

The Matrix ◽

Fe Alloys

AbstractTo investigate the effect of Fe content on the correlation between the microstructure and mechanical properties in near-b titanium alloys, the Ti-5Al-5Mo-5V-1Cr-xFe alloy system has been characterized in this study. As the Fe content increased, the number of nucleation sites and the volume fraction of theαphase decreased. We observed a significant difference in the shape and size of theαphase in the matrix before and after Fe addition. In addition, these morphological deformations were accompanied by a change in the shape of theαphase, which became increasingly discontinuous, and changed into globular-typeαphase in the matrix. These phenomena affected the microstructure and mechanical properties of Ti alloys. Specimen #2 exhibited a high ultimate tensile strength (1071 MPa), which decreased with further addition of Fe.

Download Full-text

Influence of Fe Content on Microstructure and Mechanical Properties of GH984 Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.816.540 ◽

2015 ◽

Vol 816 ◽

pp. 540-545

Author(s):

Chang Shuai Wang ◽

Ting Ting Wang ◽

Mei Lin Tan ◽

Yong An Guo ◽

Jian Ting Guo ◽

...

Keyword(s):

Mechanical Properties ◽

Structural Stability ◽

Rupture Life ◽

Thermal Exposure ◽

Major Constituent ◽

Microstructure And Mechanical Properties ◽

Fe Content ◽

Tcp Phase ◽

The Cost

GH984 is an economic alloy due to the elimination of Co and its containing more than 20% Fe. As a major constituent of GH984 alloy, the Fe reduces the cost, but promotes the precipitation of TCP phase. In order to get an optimum alloy with desired balance among structural stability, mechanical properties and cost, the influence of Fe content on microstructure and mechanical properties of GH984 alloy was investigated in this paper. The results showed that the Fe content had no obvious influence on the major precipitates which were spherical γ′, blocky MC and discrete M23C6 at grain boundary after standard heat treatment, except the γ/γ ́ misfit. However, during long-term thermal exposure at 750°C, the decrease of the Fe content retarded the precipitation of η phase and enhanced the structural stability. The Fe content had no obvious influence on the tensile strength and ductility. At condition of 700°C/400MPa, the rupture life had not evident change, but the elongation decreased, the fractural model exhibited mix-fracture model and the characteristics of intergranular fracture became obvious with increasing the Fe content. It can be concluded that the decrease of Fe content can improve the structural stability and ductility.

Download Full-text