Investigation of quench sensitivity of high strength Al–Zn–Mg–Cu alloys by time–temperature-properties diagrams

Liu, Shengdan; Zhong, Qimin; Zhang, Yong; Liu, Wenjun; Zhang, Xinming; Deng, Yunlai

doi:10.1016/j.matdes.2009.12.038

Cited by 131 publications

(49 citation statements)

References 15 publications

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“…7010 is a more modern composition and substitutes the chromium for a zirconium addition which results in solute free coherent Al 3 Zr dispersoids. [34] The indentation hardness measurements on the iDHD cores in Figure 9 also illustrates the quench sensitivity differences as do the E3 lattice parameter observations in Figure 14.…”

Section: Discussionmentioning

confidence: 66%

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Robinson

Tanner

Truman

et al. 2012

Materials Characterization

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The most critical stage in the heat treatment of high strength aluminium alloys is the rapid cooling necessary to form a supersaturated solid solution. A disadvantage of quenching is that the thermal gradients can be sufficient to cause inhomogeneous plastic deformation which in turn leads to the development of large residual stresses. Two 215 mm thick rectilinear forgings have been made from 7000 series alloys with widely different quench sensitivity to determine if solute loss in the form of precipitation during quenching can significantly affect residual stress magnitudes. The forgings were heat treated and immersion quenched using cold water to produce large magnitude residual stresses. The through thickness residual stresses were measured by neutron diffraction and incremental deep hole drilling. The distribution of residual stresses was found to be similar for both alloys varying from highly triaxial and tensile in the interior, to a state of biaxial compression in the surface. The 7010 forging exhibited larger tensile stresses in the interior. The microstructural variation from surface to centre for both forgings was determined using optical and transmission electron microscopy. These observations were used to confirm the origin of the hardness variation measured through the forging thickness. When the microstructural changes were accounted for in the through thickness lattice parameter, the residual stresses in the two forgings were found to be very similar. Solute loss in the 7075 forging appeared to have no significant effect on the residual stress magnitudes when compared to 7010.

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Section: Discussionmentioning

confidence: 66%

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Robinson

Tanner

Truman

et al. 2012

Materials Characterization

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show abstract

“…Aluminum chrome matrix composites (ACMC) are used in a wide range of industries including transportation, electronics, leisure, and others [1][2][3][4]. ACMC are usually produced by mechanical alloying of different kinds of metal powders using compression, at a temperature near room temperature, which results in nanocrystalline and supersaturated alloy powders at low temperatures [3].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Corrosion Behavior of Al-Zn-Cr Family Alloys

Nassef

El-Garaihy

El-Hadek

2017

Metals

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Aluminum base alloys containing chromium (Cr) and zinc (Zn) were produced using extrusion and powder metallurgy techniques. Cr additions ranged between 5 to 10 wt. %, while Zn was added in an amount between 0 and 20 wt. %. Heat treatment processes were performed during powder metallurgy process, at different temperatures, followed by water quenching. Similar alloys were extruded with an extrusion ratio of 4.6 to get proper densification. Optical microscopy was used for microstructure investigations of the alloys investigated. The element distribution microstructure study was carried out using the Energy Dispersive X-ray analysis method. Hardness and tensile properties of the investigated alloys have been examined. Wear resistance tests were carried out and the results were compared with these of the Al-based bulk alloys. Results showed that the aluminum base alloys, containing 10 wt. % Cr and heat treated at 500 • C for one hour followed by water quenching, exhibited the highest wear resistance and better mechanical properties.

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“…Aluminum matrix composites (AMC) have great potential in the transportation, electronic and leisure industry [1][2][3][4]. The research and development in this area have been devoted to the process of optimization and the property determination of the aluminum (Al) composites containing additives [2].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Corrosion Behavior of Al-Zn-Cr Family Alloys

Nassef¹,

El-Garaihy²,

El-Hadek³

2017

Preprint

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Aluminum base alloys containing chromium (Cr) and zinc (Zn) were produced using extrusion and heat treated powder metallurgy. Cr addition ranged between 5 to 10 wt. % while Zn was added in an amount between 0 to 20 wt. %. Heat treatment processes were performed during powder metallurgy process at different temperatures followed by water quenching. Similar alloys were extruded, with an extrusion ratio of 4.6 to get proper densification. Optical microscopy was used for microstructure investigations of the produced alloys. The element distribution microstructure study was carried out using the Energy Dispersive X-ray analysis method. Hardness and tensile properties of the investigated alloys have been examined. Wear resistance tests were carried out and the results were compared with these of the Al-based bulk alloys. Results showed that the aluminum base alloys containing 10wt. % Chromium and heat treated at 500°C for one hour followed by water quenching exhibited the highest wear resistance and better mechanical properties.

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Investigation of quench sensitivity of high strength Al–Zn–Mg–Cu alloys by time–temperature-properties diagrams

Cited by 131 publications

References 15 publications

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Mechanical and Corrosion Behavior of Al-Zn-Cr Family Alloys

Mechanical and Corrosion Behavior of Al-Zn-Cr Family Alloys

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