Effect of pre/post T6 heat treatment on the mechanical properties of laser welded SSM cast A356 aluminium alloy

Akhter, Rumana; Ivanchev, L.; Burger, H.P.

doi:10.1016/j.msea.2006.10.148

Cited by 57 publications

(26 citation statements)

References 6 publications

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“…4. An ageing time of 8 h at 180°C was considered to be sufficient to obtain a stable microstructure by completing the major phase changes in the alloy [12,13,[23][24][25][26].…”

Section: Discussionmentioning

confidence: 99%

Dry Sliding Friction and Wear Properties of Al–25Zn–3Cu–(0–5)Si Alloys in the As-Cast and Heat-Treated Conditions

Savaşkan¹,

Bican²

2010

Tribol Lett

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Dry sliding friction and wear properties of ternary Al-25Zn-3Cu and quaternary Al-25Zn-3Cu-(1-5)Si alloys were investigated using a pin-on-disc test machine after examining their microstructures and mechanical properties. An alloy (Al-25Zn-3Cu-3Si), which exhibited the highest tensile and compressive strengths, was subjected to T7 heat treatment. Surface and subsurface of the wear samples were investigated using scanning electron microscopy (SEM). The hardness and both tensile and compressive strengths of the alloys increased with increasing silicon content, but the trend reversed for the latter ones above 3% Si. It was observed that T7 heat treatment reduced the hardness and both tensile and compressive strengths of the Al-25Zn-3Cu-3Si alloy, but increased its elongation to fracture greatly. Three distinct regions were observed underneath the surface of the wear samples of the Al-25Zn-3Cu-3Si alloy. The formation of these regions was related to the heavy deformation of surface material and mixing, oxidation and smearing of wear material. Al-25Zn-based ternary and quaternary alloys in both as-cast and heat-treated conditions were found to be superior to SAE 660 bronze as far as their mechanical and dry sliding wear properties are concerned.

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“…4. An ageing time of 8 h at 180°C was considered to be sufficient to obtain a stable microstructure by completing the major phase changes in the alloy [12,13,[23][24][25][26].…”

Section: Discussionmentioning

confidence: 99%

Dry Sliding Friction and Wear Properties of Al–25Zn–3Cu–(0–5)Si Alloys in the As-Cast and Heat-Treated Conditions

Savaşkan¹,

Bican²

2010

Tribol Lett

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“…The processes occurring during the heat treatment, therefore, have an opposite effect on the number of particles per unit area eutectic structures. Consequently, the morphology of eutectic Si plays a vital role in determining the mechanical properties of Al-Si alloys [21,22]. The identification of the intermetallic phases of the squeeze cast alloy under 110 MPa before and after heat treatment was realized firstly with the help of SEM (see Fig.…”

Section: Microstructure After Heat Treatmentmentioning

confidence: 99%

Investigation of the microstructure and mechanical properties of squeeze cast Al-11%Si alloy heat treated

Barhoumi¹,

Souissi²,

Amar³

et al. 2016

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Squeeze casting is the combination of casting and forging processes, which solidifies the molten metal under high pressure. Applying pressure during melt-solidification can change several characteristics of the material. The present paper aims to evaluate the effect of pressure levels and T6 heat treatment on the microstructure and mechanical properties of Al-11%Si alloy produced by gravity and squeeze casting process. The results have shown that the applied pressure refines the microstructure, improves the tensile properties and increases the Vickers hardness. Additionally, when the T6 heat treatment was applied, spheroidized eutectic Si particles and fragmented β phase particles were formed, and the mechanical properties were improved.K e y w o r d s : Al-11%Si, squeeze casting, T6 heat treatment, microstructure, mechanical properties

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“…Laser welding technology have some disadvantages in comparison with other conventional joining technologies, as the high costs of equipment, strict requirements concerning the laser beam adjustment and the samples alignment. However, laser welding show important advantages compared with other techniques, as the low heat input, the high localisation ability, the high welding speed, the high flexibility, the high weld quality and the high production rate [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Keyhole regime involves the employment of higher density power and usually leads to narrower welding beads than the conduction regime [4,5,7,8]. The former mechanism often generates welding beads with high porosity due to gas entrapment occurring during the solidification of the weld pool.…”

Section: Introductionmentioning

confidence: 99%

“…5083 and 6082 aluminium alloy samples have been processed with a high power diode laser of a maximum power of 2.8 kW in order to generate butt welds of higher penetration than those published in the recent literature under conduction regime [1,14]. Thus, although deeper penetration welds of aluminium alloys have been achieved in previous works under keyhole regime with CO 2 [8,[15][16][17][18] and Nd:YAG [4,7,19] lasers, only butt welds up to 1 mm deep in the case of aluminium alloys [1,14] and up to 2 mm in aluminium metal matrix composites [8] have been obtained so far under conduction regime with diode lasers. The size and properties of the welds obtained with different laser powers (between 1.5 and 2.75 kW) and processing rates (between 0.2 and 5 m/min) have been studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser welding of aluminium alloys 5083 and 6082 under conduction regime

Sánchez-Amaya

Delgado

González-Rovira

et al. 2009

Applied Surface Science

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Effect of pre/post T6 heat treatment on the mechanical properties of laser welded SSM cast A356 aluminium alloy

Cited by 57 publications

References 6 publications

Dry Sliding Friction and Wear Properties of Al–25Zn–3Cu–(0–5)Si Alloys in the As-Cast and Heat-Treated Conditions

Dry Sliding Friction and Wear Properties of Al–25Zn–3Cu–(0–5)Si Alloys in the As-Cast and Heat-Treated Conditions

Investigation of the microstructure and mechanical properties of squeeze cast Al-11%Si alloy heat treated

Laser welding of aluminium alloys 5083 and 6082 under conduction regime

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