Effect of T6 Heat Treatment in Tribological Properties of A356 Aluminum Alloy Reinforced with Al2O3 Nanoparticles by Combination Effect of Stir and Squeeze Casting Method

2014 ◽  
Vol 592-594 ◽  
pp. 968-971 ◽  
Author(s):  
K. Sekar ◽  
Allesu Kanjirathikal ◽  
M.A. Joseph
Keyword(s):  
Heat Treatment ◽  
Tribological Properties ◽  
Squeeze Casting ◽  
Casting Machine ◽  
A356 Alloy ◽  
Heat Treatment Condition ◽  
Attractive Alternative ◽  
T6 Heat Treatment ◽  
A356 Aluminum ◽  
Pin On Disk

A356 alloys are attractive alternative for automotive and aeronautical applications. In this work the effects of T6 heat treatment in tribological properties of A356 alloy reinforced with Al2O3 nanoparticles of size 30nm are investigated. The percentage inclusions Al2O3 were varied from 0.5 to 1.5wt%. The particles were added with stirring at 400rpm and squeeze casting at 7500c and pressure of 600Mpa in the squeeze casting machine. The tribological properties of the samples were also investigated by pin-on-disk tests at 10,30,50and 70N, sliding speed 0.534m/s and sliding distance 1100m in dry condition. The lowest dry wear rate obtained through T6 heat treatment condition.

Comparison Study of As-Cast and T6 Condition of Microstructure, Bending Strength and Double Shear Strength of A356 Alloy by Gravity, Vacuum and Squeeze Casting

2014 ◽  
Vol 592-594 ◽  
pp. 102-105 ◽  
Author(s):  
K. Sekar ◽  
Allesu Kanjirathikal ◽  
M.A. Joseph
Keyword(s):  
Heat Treatment ◽  
Shear Strength ◽  
Squeeze Casting ◽  
Bending Strength ◽  
A356 Alloy ◽  
Gravity Casting ◽  
Vacuum Casting ◽  
T6 Heat Treatment ◽  
Double Shear ◽  
Treatment Conditions

The hardness, bending strength, and double shear strength of A356 aluminium alloy was studied under as cast and T6 heat treatment conditions obtained with gravity casting, vacuum casting and squeeze casting methods. The results of these three casting methods have been compared. The hardness, bending strength of A356 alloy after T6 obviously increased; the hardness value of both vacuum casting and squeeze casting has been found to be 62 HRB which is relatively high compared to gravity casting. The bending strength of gravity casting is 299 MPa (22% increase) compared to vacuum casting. However, after T6 heat treatment, the double shear strength values of all these three castings decreases.

Fatigue Behavior Improvement of A356 Aluminum Alloy of Motorcycle Cast Wheel Produced by High Speed Centrifugal Casting Based on T6 Heat Treatment and Artificial Aging

2020 ◽  
Vol 991 ◽  
pp. 86-93
Author(s):  
Priyo Tri Iswanto ◽  
Akhyar Hasan ◽  
Aditya Janata ◽  
Luthfi Muhammad Mauludin ◽  
Hizba Muhammad Sadida
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Speed ◽  
Artificial Aging ◽  
Fatigue Behavior ◽  
Centrifugal Casting ◽  
Aging Treatment ◽  
A356 Aluminum Alloy ◽  
T6 Heat Treatment ◽  
A356 Aluminum

Fatigue behavior of A356 aluminum alloy for motorcycle rim was experimentally investigated based on T6 heat treatment and artificial aging. The high speed of 1,100 rpm from centrifugal casting was used in this study. The pouring temperature at 750 °C was employed and the preheated temperature at 250 °C was applied on the mold. The solution heat treatment of the sample was conducted for 4 hours at 540 o C before it immersed into the water for rapid cooling at room temperature. This step followed by natural aging treatment at 30 °C and artificial aging treatment at 150 °C, 175 °C, and 200 °C for 2 hours, respectively. It is found that increasing centrifugal casting speed into 1,100 rpm combined with heat treatment and artificial aging temperature can significantly increase not only its mechanical properties but also the fatigue life of motorcycle wheel made of A356 aluminum alloy. This experiment proved that the lowest fatigue crack growth rate obtained with this method was at temperature of 175°C.

scholarly journals Microstructural Features and Wear Characteristics of Semi-Solid Processed A356 Aluminum Alloy

2018 ◽  
Vol 5 ◽  
Author(s):  
K. Raju ◽  
N. Gopi Krishna ◽  
L. Sankara Rao ◽  
S. N.Ojha
Keyword(s):  
Heat Treatment ◽  
Cold Water ◽  
Isothermal Holding ◽  
Hot Forging ◽  
Cold Forging ◽  
Al Alloy ◽  
T6 Heat Treatment ◽  
Solid Region ◽  
A356 Aluminum ◽  
Semi Solid

In the present study the microstructural features and tribological characteristics of hot forged A356 Al alloy subjected to SIMA (Strain induced melt activation) and T6 heat treatment (semi-solid) processes have been investigated. The SIMA process consists of hot forging of alloy at 325˚C followed by cold forging at room temperature, isothermal holding at 580˚C for 10 min and quenching. In case of T6 heat treatment, the hot forged alloy was solution treated at 540˚C for 4 hours followed by quenching in cold water and artificial aging at 155˚C for 3 hours. The microstructure of the alloy exhibited a spherical or globular morphology of the primary α-phase with uniform distribution of solutes in the interdendritic region. A detailed analysis of the solidification behaviour of the melt from semi-solid region of the alloy is reported. The reasons for the consequential changes in tribological properties of A356 Al alloy processed by SIMA andT6 heat treatment have been clearly brought out.

scholarly journals Enhancing the Tribological Properties of Talc and Boron Nitride based Composites by T6 - Heat Treatment

2020 ◽  
Vol 764 ◽  
pp. 012049
Author(s):  
Anandha Moorthy Appusamy ◽  
Prakash Eswaran ◽  
Madheswaran Subramani ◽  
Santhanakumar Sadaiappan ◽  
Karthik Shanmugavel
Keyword(s):  
Heat Treatment ◽  
Boron Nitride ◽  
Tribological Properties ◽  
T6 Heat Treatment

Effect of T6 Heat Treatment on the Microstructures and the Aging Behavior of the Grain-Refined A356 Alloys

2010 ◽  
Vol 143-144 ◽  
pp. 1410-1414
Author(s):  
Man Zhu ◽  
Gen Cang Yang ◽  
Li Juan Yao ◽  
Yao He Zhou
Keyword(s):  
Heat Treatment ◽  
Solution Treatment ◽  
A356 Alloy ◽  
Aging Behavior ◽  
T6 Heat Treatment ◽  
Solid Solution Treatment ◽  
Aging Precipitation ◽  
Mean Diameter ◽  
Dsc Curves ◽  
Silicon Particles

The influence of T6 heat treatment on the microstructures and aging precipitation in the grain-refined A356 alloys were investigated. Experimental results showed that, when T6 heat treatment was performed, the average values of mean diameter, aspect ratio, and roundness of silicon particles in the grain-refined specimens were decreased to 2.26~3.14 μm, 2.06~2.2, and 3.1~4.2, respectively. DSC curves revealed that three kinds of precipitates, i.e., β″, β′, and β, were observed in both unrefined and grain-refined A356 alloys. The exothermic peaks in the grain-refined A356 alloy shifted to high temperatures, suggesting the nucleation of β″ precipitates was decelerated. This could be ascribed to the minor solution of Ti or B elements during solid solution treatment.

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