Effect of Trace Elements on the Crystallization Temperature Interval and Properties of 5xxx Series Aluminum Alloys

Abstract

The influence of alloying elements Er, Zr, Cu, Si and Zn on the crystallization temperature interval, microstructure, mechanical properties and corrosion behavior of Al-Mg-Mn alloy were studied by differential scanning calorimetry (DSC), electron backscatter diffraction (EBSD), X-ray diffraction (XRD), tensile testing, electrochemical measurements and nitric acid mass loss test (NAMLT). The results show that the crystallization temperature range of Al-Mg-Mn alloy with addition of Zn decreased 4.7 °C. Cold rolled alloys mainly contain S texture, Copper texture, Brass texture, and Goss texture; the content of the S texture is the highest. With the addition of trace elements, the second phase Al3Er, Al3Zr, Al2CuMg, Mg2Si and MgZn2 can be formed, which can improve the tensile strength and yield strength of Al-Mg-Mn alloy. The addition of the alloying element Zn can also improve the intergranular corrosion resistance of the Al-Mg-Mn alloy.

Microstructure and Wear Resistance of Mg2Si–Al Composites Fabricated Using Semi-Solid Extrusion

“…Therefore, changing the size, morphology, and distribution of the coarse dendritic Mg 2 Si, thereby improving its comprehensive performance, has become the primary problem to be solved. Researchers [3][4][5][6][7] have performed much work on preparation methods, microstructure control, and material properties, and have made some progress, but further research is still needed.…”

Intergranular corrosion effect on fatigue behavior of dissimilar 6005A‐5083 aluminum alloys weld joints

“…In terms of the 5083 alloy, it has been reported that the β phase (Al 3 Mg 2 ) precipitates present in the matrix are sensitive to corrosion, and so they react preferentially to undergo pitting corrosion. [ 23,31 ] The presence of β phase precipitates along the intergranular region, therefore, reduces the corrosion resistance of the alloy; however, under the influence of the welding heat, the redissolution of the β phase into matrix results in improved corrosion resistance in the HAZ of the 5083 alloy.…”

High-Temperature Mechanical Properties and Microstructure of Ultrathin 3003mod Aluminum Alloy Fins

“…However, due to the small difference in atomic radius between Al and Zn, and the limited solid solubility of Zn in aluminum up to 32.8%, adding 1-2 wt.% Zn to aluminum mkaes little contribution to the mechanical properties of the alloy [18]. The main reason for adding Zn to pure aluminum is attributed to its significant impact on corrosion performance, which could dramatically reduce the potential of aluminum alloy and significantly improve the stress corrosion cracking (SCC) resistance of the alloys [19,20], such that Zn-containing aluminum alloys are generally used as a sacrifice material for heat exchangers to protect the tube or plate material with higher corrosion potential. Due to the significantly lower strength of ultrathin 3××× aluminum alloy at high temperatures compared to room temperature, and the very low load required for fracturing in high-temperature tensile tests (<200 N), it is extremely difficult to test high-temperature mechanical properties.…”