The application of advances in quench factor analysis property prediction to the heat treatment of 7010 aluminium alloy

Flynn, Robert J.; Robinson, J. S.

doi:10.1016/j.jmatprotec.2004.04.133

Cited by 45 publications

(18 citation statements)

References 10 publications

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“…To check for further consistency, the data from a third independent quench sensitivity study by Flynn [39,40] for a 7010 aluminum alloy forging were used and fitted with Equation 8.a. The results are presented in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Hardness–strength relationships in the aluminum alloy 7010

Tiryakioğlu

Robinson

Salazar-Guapuriche

et al. 2015

Materials Science and Engineering: A

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Section: Resultsmentioning

confidence: 99%

Hardness–strength relationships in the aluminum alloy 7010

Tiryakioğlu

Robinson

Salazar-Guapuriche

et al. 2015

Materials Science and Engineering: A

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121

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“…This is illustrated in the time-temperature property curves presented in Figure 1. [5] These "C curves" show the times required to precipitate sufficient solute to change the strength by a specified amount, in this case to give strengths of 70% and 99.5% of that achievable in material quenched infinitely quickly. Precipitation that occurs during quenching changes the subsequent response of the material to aging, but can also potentially influence the magnitude of the residual stress distribution introduced by rapid cooling by lowering the flow stress.…”

Section: Introductionmentioning

confidence: 99%

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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“…These findings contradict the present results according to EDX and XRD analysis (i.e., numerous MgZn 2 phases). There are many peaks of the MgZn 2 , and Mg 2 Zn 11 are increased this because of the effects of steps the retrogression and reaging process which its details as follow- ing: The generally accepted precipitation sequences for 7000 series aluminum alloys are as follows: [20,21]; supersaturated solid solution → coherent stable GuinierPreston (GP) zones → semi-coherent intermediate η′ (Mg 2 Zn 11 ) phase → incoherent stable η(MgZn 2 ) or T (AlMg 4 Zn 11 ) phase. Metastable η′ phase was the primary precipitation hardening phase of these alloys.…”

Section: Resultsmentioning

confidence: 99%

Microstructural Evaluation and Mechanical Properties of an Al-Zn-Mg-Cu-Alloy after Addition of Nickel under RRA Conditions

Naeem¹,

Mohammed²

2013

MSA

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The effects of nickel in improving the mechanical properties and microstructure of Al-Zn-Mg-Cu alloys produced by semi-direct chill casting were investigated. Aluminium alloys were homogenized at different temperatures conditions, which aged at 120˚C for 24 h (T6 temper), and retrogressed at 180˚C for 30 min and then re-aged at 120˚C for 24 h (RRA). The results of the microstructural analyses showed that with adding nickel to aluminium alloy, nickel-rich dispersoid particles were formed, such as Al 7 Cu 4 Ni, Al 4 Ni 3 , Al 75 Ni 10 Fe 15 , Al 3 Ni 2 , and Al 50 Mg 48 Ni 7 . Intermetallics compounds within the matrix alloy led to dispersion and fine-grain mechanisms which prevent the recrystallization and grain growth. Enhancement of mechanical properties of the alloys study is obtained through the precipitation hardening of alloying elements of the base alloy besides Ni-bearing dispersoid particles. The microstructure of these alloys was examined through optical and scanning electron microscopy along with energy dispersive X-ray and X-ray diffraction.

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The application of advances in quench factor analysis property prediction to the heat treatment of 7010 aluminium alloy

Cited by 45 publications

References 10 publications

Hardness–strength relationships in the aluminum alloy 7010

Hardness–strength relationships in the aluminum alloy 7010

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

Microstructural Evaluation and Mechanical Properties of an Al-Zn-Mg-Cu-Alloy after Addition of Nickel under RRA Conditions

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