Effect of thermal and mechanical pretreatments on the guinier-preston zone state of a commercial 7075 aluminum alloy

Healey, J.T.; Gould, R. W.

doi:10.1007/bf02646564

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…Through computational neural networks, fed by metallurgical-related trends regarding the formation of precipitates and their hardening effect, they were able to predict the emerging mechanical properties including yield strength, as a function of the heating parameters. From an experimental perspective, Singh [6] studied the influence of thermomechanical ageing on the mechanical properties of AA2014, showing that the strengthening effects are due to Guinier-Preston (GP) zones [7], extremely fine solute-enriched particulates, commonly referred to as θ'' when precipitates are coherent, and θ' when partially coherent which pin dislocations, resulting in even greater strengthening than solid solution strengthening can achieve. The precipitates are enriched in copper, which makes them commonly formed in these 2xxx alloys.…”

Section: Introductionmentioning

confidence: 99%

On the Pre-Forging Heating Methods for AA2014 Alloy

Turner,

2023

WJET

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The aluminium alloy AA2014 is one of the most widely used of the 2xxx series alloys, owing to its superior strength-to-weight ratio and stiffness. It is commonly forged to shape for use in aerospace parts. Three different small pilot-scale AA2014 billets were subjected to different heating operations, to physically simulate a pre-forge heating operation. The unheated sample and heated samples were then analysed for micro structural evolution and mechanical properties, to understand how the pre-forge heat treatments may vary the starting condition of the alloy before being forged. It was shown that an induction heating process has the greatest impact upon the precipitation distribution. Whilst this variation is commonly considered a negative impact, the opportunity to control the induction heating to promote preferential microstructure at specific locations within the billet may be possible.

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Section: Introductionmentioning

confidence: 99%

On the Pre-Forging Heating Methods for AA2014 Alloy

Turner,

2023

WJET

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Precipitation and dissolution processes in age-hardenable Al Alloys — A comparison of positron annihilation and X-ray small-angle scattering investigations. II. AlZn(4.5 at%)–Mg(x) (x = 0, 0.2, 1, and 2.5 at%)

Kabisch

Dlubek

Löffler

et al. 1980

Phys. Stat. Sol. (a)

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The precipitation and dissolution processes going on during continuous heating (heating rate of 1 K/min) in four AlZn(4.5)–Mg(x) alloys are studied by means of XSAS, TEM, and PAS investigations. The XSAS and TEM investigations give strong evidence that only GP zones as well as η′‐particles of overcritical size are transformed directly into the more stable phases during the heating procedure. GP zones and η′‐particles of subcritical size are dissolved attaining their dissolution temperature and on the expense of this material the more stable phases are formed. The PAS results are very strongly influenced by the Mg additions which can be understood by the formation of VZnMg complexes. Most probably in case of the presence of zones the positrons are mainly trapped by monovacancies bound to Mg atoms inside the Zn‐rich GP zones. Due to this special trapping effect the PAS is not in a direct and simple way related to the various precipitation processes going on in the AlZnMg alloy as known from the AlZn alloys. The formation of partially coherent and incoherent precipitates causes an increase of the h‐parameter which can be understood by localization of positrons at parts of the incoherent particle‐matrix interfaces of high‐angle boundary type.

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Changes in solid solution composition as a function of artificial ageing time for aluminium alloy 7075

Bartges

1994

Journal of Materials Science Letters

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Effect of thermal and mechanical pretreatments on the guinier-preston zone state of a commercial 7075 aluminum alloy

Cited by 6 publications

References 25 publications

On the Pre-Forging Heating Methods for AA2014 Alloy

On the Pre-Forging Heating Methods for AA2014 Alloy

Precipitation and dissolution processes in age-hardenable Al Alloys — A comparison of positron annihilation and X-ray small-angle scattering investigations. II. AlZn(4.5 at%)–Mg(x) (x = 0, 0.2, 1, and 2.5 at%)

Changes in solid solution composition as a function of artificial ageing time for aluminium alloy 7075

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