Homogenization of direct chill cast AlSi1MgMn billets
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Yucel Birol
Abstract
The homogenization practice for direct chill cast AlSi1MgMn billets was investigated. It takes 8 h at 570 °C and at least 4 h at 580 °C to even out the Mg and Si distribution in the aluminium matrix and to obtain relatively small discrete αc-Al12(Fe, Mn)3Si particles with a “necklace” configuration. Once Mg and Si are solutionized, the equilibrium β-Mg2Si phase precipitates during post-soaking cooling at ≥ 500 K h–1. β′-Mg2Si precipitates are also identified in samples cooled at ≤ 250 K h−1. Hardness produced in this cooling rate range is relatively lower suggesting improved extrudability. These billet samples are fully solutionized at 500 °C during billet pre-heating. Typical press exit temperatures may suffice for adequate age hardening in billet samples soaked at 580 °C for 8 h and subsequently cooled at 250 K h−1. This is a very attractive feature as it implies a full age hardening capacity even without the need for a separate solution heat treatment.
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Articles in the same Issue
- Contents
- Contents
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- Microwave absorbing materials based on polyaniline composites: a review
- Atomic mobilities in fcc Cu–Mn–Ni–Zn alloys and their characterizations of uphill diffusion and zero-flux plane phenomena
- Synthesis and characterization of nanocristalline Fe-40 at.% Si alloy prepared by high energy ball milling
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- Nanoscratch characterization of indium nitride films
- Role of axial thrust in the formation of microstructure and fracture surface of the weld zone in friction stir welded AA6063 aluminium alloy
- Microstructures and corrosion resistance of three typical superlight Mg–Li alloys
- The effect of magnetron-deposited Al2O3 coating on the corrosion resistance of Ti–Al alloys in a 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2 atmosphere
- Homogenization of direct chill cast AlSi1MgMn billets
- Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy
- Thermal treatment induced transition from Zn3(OH)2(BDC)2 (MOF-69c) to Zn4O(BDC)3 (MOF-5)
- Thermal investigation of alumina-based pastes and refractory mixturesd
- Short Communications
- One-step magnetic modification of non-magnetic solid materials
- DGM News
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Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Microwave absorbing materials based on polyaniline composites: a review
- Atomic mobilities in fcc Cu–Mn–Ni–Zn alloys and their characterizations of uphill diffusion and zero-flux plane phenomena
- Synthesis and characterization of nanocristalline Fe-40 at.% Si alloy prepared by high energy ball milling
- An investigation of the microstructure and hydrogenation/dehydrogenation properties of ball-milled CeMg12 alloys with Ni powders
- Nanoscratch characterization of indium nitride films
- Role of axial thrust in the formation of microstructure and fracture surface of the weld zone in friction stir welded AA6063 aluminium alloy
- Microstructures and corrosion resistance of three typical superlight Mg–Li alloys
- The effect of magnetron-deposited Al2O3 coating on the corrosion resistance of Ti–Al alloys in a 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2 atmosphere
- Homogenization of direct chill cast AlSi1MgMn billets
- Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy
- Thermal treatment induced transition from Zn3(OH)2(BDC)2 (MOF-69c) to Zn4O(BDC)3 (MOF-5)
- Thermal investigation of alumina-based pastes and refractory mixturesd
- Short Communications
- One-step magnetic modification of non-magnetic solid materials
- DGM News
- DGM News
