Mechanical Performance of a Cast A354 Aluminium Alloy

2014 ◽  
Vol 794-796 ◽  
pp. 489-494 ◽  
Author(s):  
J.H. Sandoval ◽  
Adel M.A. Mohamed ◽  
S. Valtierra ◽  
F.H. Samuel
Keyword(s):  
Tensile Properties ◽  
Quality Index ◽  
Mechanical Performance ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Test Results ◽  
Cast Aluminum ◽  
Treatment Conditions ◽  
Cast Aluminum Alloys

Cast aluminum alloys are an important group of materials which find wide application in the automotive industry. Insufficient studies have been carried out to date with regard to the mechanical performance of the aged A354 alloy. Therefore, the present work investigates the Quality index charts with the purpose of setting the limits of the tensile properties, as well as for comparing the mechanical behavior of cast alloy A354, to delineate the effect of the solution treatment applied. Tensile properties upon artificial aging in the temperature range of 155–350oC for times ranging from 2 to 100 hours are also investigated. The results showed that the use of quality index charts is a satisfactory method for presenting tensile test results and, for assessing the effect of solution and aging treatment conditions subjected to the modified and grain-refined A354 alloys. It is also observed that the quality index, Q, is more sensitive to variations in the tensile ductility than to tensile strength.

Mechanical Performance Evaluation of Cast Magnesium Alloys for Automotive and Aeronautical Applications

2006 ◽  
Vol 129 (3) ◽  
pp. 422-430 ◽  
Author(s):  
Sp. G. Pantelakis ◽  
N. D. Alexopoulos ◽  
A. N. Chamos
Keyword(s):  
Aluminum Alloys ◽  
Magnesium Alloys ◽  
Quality Index ◽  
Mechanical Performance ◽  
Cast Aluminum ◽  
Treatment Conditions ◽  
Cast Aluminum Alloys ◽  
Structural Applications ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium

The potential of cast magnesium alloys for being used as structural materials in lightweight applications is assessed. The ability of the alloys for mechanical performance is evaluated and compared against the ability of widely used structural aircraft cast aluminum alloys. The specific quality index QDS, devised for evaluating both cast and wrought aluminum alloys, will be exploited to evaluate the ability of a number of cast magnesium alloys for mechanical performance. The exploited quality index QDS involves the material’s yield strength Rp to account for strength, the strain energy density W to account for both tensile ductility and toughness, and the material’s density ρ. The effects of differences in chemical composition and heat treatment conditions on the mechanical performance of cast magnesium alloys have been assessed. The use of the quality index QDS has been proved to appreciably facilitate the evaluation of the mechanical performance of cast magnesium alloys and also the comparison between alloys of different base materials. The results quantify the gap to be closed such as to involve cast magnesium alloys in aircraft structural applications.

Effect of solution treatment parameters on tensile properties of cast aluminum alloys

1990 ◽  
Vol 8 (1) ◽  
pp. 63-70 ◽  
Author(s):  
S. Shivkumar ◽  
S. Ricci ◽  
C. Keller ◽  
D. Apelian
Keyword(s):  
Aluminum Alloys ◽  
Tensile Properties ◽  
Solution Treatment ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys

The Evolution of Heat Treatment on the Tensile Properties of Na-Modified Al-Mg2Si In Situ Composite

2011 ◽  
Vol 311-313 ◽  
pp. 283-286 ◽  
Author(s):  
R. Khorshidi ◽  
A. Honarbakhsh Raouf ◽  
M. Emamy ◽  
H.R. Jafari Nodooshan
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Quality Index ◽  
Solution Treatment ◽  
Test Results ◽  
Temperature Level ◽  
In Situ Composite ◽  
Different Temperatures

The effect of different solution temperatures has been investigated on the tensile properties of Na-modified Al-Mg2Si in situ composite specimens which were subjected to solutionizing at different temperatures of 480 °C, 500 °C and 520 °C for holding time of 4 h followed by quenching. Tensile test results indicated that elongation value gradually increases upon solution treatment whereas ultimate tensile strength (UTS) reduces. The results of solution treatment also showed that the highest quality index is achieved in 500 °C (354 MPa) and so it is revealed optimum solutionizing temperature level (500 °C) for improving tensile properties.

The Effects of Heat Treatments and Tungsten Additions on Microstructures and Tensile Properties of Powder Metallurgy Ti-48Al-2Nb-2Cr

2010 ◽  
Vol 638-642 ◽  
pp. 1406-1411 ◽  
Author(s):  
Dong Yi Seo ◽  
S. Bulmer ◽  
H. Saari ◽  
Peter Au
Keyword(s):  
Tensile Properties ◽  
Hot Isostatic Pressing ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Beta Phase ◽  
Mixed Mode Fracture ◽  
Controlled Cooling ◽  
Alloy Strength ◽  
Fully Lamellar ◽  
And Tungsten

The microstructures and tensile properties of a fully lamellar Ti-48Al-2Cr-2Nb, and two tungsten-modified versions, Ti-48Al-2Cr-2Nb-0.5W and Ti-48Al-2Cr-2Nb-1.0W (atomic percent) are investigated. Gas atomized powders are consolidated by hot isostatic pressing followed by solution treatment and aging. The microstructures are characterized by optical, scanning electron, and transmission electron microscopy and mechanical properties are characterized by room temperature tensile testing. The solution heat treatment, combined with controlled cooling, generates relatively fine, fully lamellar grains. Tungsten reduces the propensity for martensitic gamma formation during cooling, and slows down lamellar coarsening as well as the formation of equiaxed gamma phase during aging. The aging treatment stabilizes the microstructure and, in the tungsten-modified alloys, causes beta phase precipitation at lamellar interfaces and grain boundaries. Both aging and tungsten additions increase the alloy strength and reduce ductility. The fracture morphologies of the alloys are similar and exhibit mixed-mode fracture consisting of inter- and intra-granular cracking, as well as inter-lamellar cracking.

scholarly journals Tensile properties of as-cast aluminum alloys AA3104, AA6111 and CA31218 at above solidus temperatures

2008 ◽  
Vol 497 (1-2) ◽  
pp. 388-394 ◽  
Author(s):  
A.B. Phillion ◽  
S. Thompson ◽  
S.L. Cockcroft ◽  
M.A. Wells
Keyword(s):  
Aluminum Alloys ◽  
Tensile Properties ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys

Effect of Retrogression and Re-Aging Treatment on the Organization and Properties of Cast Aluminum Alloys

2013 ◽  
Vol 850-851 ◽  
pp. 144-147
Author(s):  
Xin Huang ◽  
Xiao Yan Zhang ◽  
Juan Juan Wu ◽  
Lei Fan
Keyword(s):  
Tensile Strength ◽  
Aging Treatment ◽  
Sem Analysis ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys ◽  
The Matrix ◽  
Casting Aluminum Alloy ◽  
Casting Aluminum ◽  
High Level ◽  
T Phase

In this paper, Samples are subjected to tensile test, metallographic microscope observation, scanning electron microscopy (SEM) analysis for exploring the effect of different retrogression and re-aging (RRA) treatments on the organization and properties of casting aluminum alloy. Results show that after aging at 170°C for 10h ,then regression at 230°C for 10min ,finally aging at 170°C for 10h, tensile strength of the sample is 430.19MPa, elongation is 6.18%, compared with the sample aged at 170°C for 10h (The tensile strength was 426.78MPa, elongation was 3.68%). It demonstrated that through the RRA process, strength of sample can effectively maintain at a similar high level as the samples processed single-stage aging. Meanwhile, the elongation of the sample increase nearly 67.9%. The microstructure characterizations indicate that RRA treatment induced the formation and growth of rod-like T phase, and the T phase homogeneously dispersed in the matrix of alloy. This process is proposed to be the major reason for the improvement of ductility.

Friction Stir Processing: Effect on Microstructure and Mechanical Properties in Cast Aluminum Alloys

2019 ◽  
Author(s):  
Murat Tiryakioğlu ◽  
Nelson Netto
Keyword(s):  
Aluminum Alloys ◽  
Friction Stir Processing ◽  
Quality Index ◽  
Structural Quality ◽  
Casting Defects ◽  
Cast Aluminum ◽  
Friction Stir ◽  
Index Analysis ◽  
Cast Aluminum Alloys ◽  
Eutectic Si

Microstructural and mechanical data from the literature of friction stir processed (FSPed) cast aluminum alloys were reanalyzed. Results indicated that friction stir processing (FSP) produced more homogeneous microstructures, with finer eutectic Si particles, grains, and intermetallics. However, a relationship between microstructural measures and process parameters could not be established. Regardless of the resultant microstructure, structural casting defects, i.e., pores and oxide films, were reduced in size or completely eliminated after FSP. Consequently, ductility and fatigue life were drastically improved by FSP. Quality index analysis showed that some FSPed specimens have a higher structural quality than aerospace and premium quality castings, and can be used to determine the intrinsic properties of cast aluminum alloys.

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