The Effect of Hot Isostatic Pressing on Mechanical Properties of Cast Aluminum Alloy

2002 ◽  
Vol 26 (3) ◽  
pp. 461-470
Author(s):  
Gi-Tae Kim ◽  
Hun-Cheol Yang ◽  
Jae-Yun Choe
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Hot Isostatic Pressing ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Isostatic Pressing

PROSPECTS FOR THE USE OF HOT ISOSTATIC PRESSING IN CAST ALUMINUM ALLOYS (review)

2021 ◽  
pp. 17-26
Author(s):  
E.A. Prokhorchuk ◽  
◽  
K.A. Vlasova ◽  
A.V. Trapeznikov ◽  
Yu.V. Reshetnikov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Hot Isostatic Pressing ◽  
Term Strength ◽  
Cast Aluminum ◽  
Dense Structure ◽  
Isostatic Pressing ◽  
Cast Aluminum Alloys ◽  
Strength Tests

The article provides an overview of studies on the influence of HIP on the density, roughness and mechanical properties of cast aluminum alloys. As a result of HIP, the density of the alloy, its ductility, and cyclic characteristics increase, and the scatter of mechanical properties determined during tensile and long-term strength tests decreases. The use of HIP increases the yield of good casting due to the reduction of rejects due to unacceptable porosity detected during х-ray inspection. Thus, the casting acquires a homogeneous, completely dense structure.

Effect of Non-Conventional Aging Treatments on the Tensile Properties of Non-Hipped Castings of Aluminum Alloy 354

2014 ◽  
Vol 875-877 ◽  
pp. 1397-1405 ◽  
Author(s):  
G. Dinesh Babu ◽  
M. Nageswara Rao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Artificial Aging ◽  
Natural Aging ◽  
Single Step ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Automobile Components

Cast aluminum alloy 354 is used extensively for production of critical automobile components, owing to its excellent castability and attractive combination of mechanical properties after heat-treatment. With the advent of higher performance engines, there has been a steady demand to further improve the mechanical behavior of the castings made of the alloy, among others, through improvements in processing. The present study explores the possibility of improving tensile properties of the alloy by adopting certain non-conventional aging treatments. The non-conventional treatments include aging cycles similar to T6I4 and T6I6 referred to in the published literature, artificial aging in two steps instead of in single step and artificial aging preceded by various natural aging times. The results show that none of these non-conventional treatments leads to improvement of all tensile properties compared to the standard T61 treatment. Significant hardening takes place in the alloy due to natural aging. Changing the time of natural aging preceding artificial aging was found to have little effect on tensile properties.

Influence of Aging Temperatures and Times on Mechanical Properties of Vacuum High Pressure Die Cast Aluminum Alloy A356

2012 ◽  
Vol 445 ◽  
pp. 277-282 ◽  
Author(s):  
Xue Zhi Zhang ◽  
Kazi Ahmmed ◽  
Meng Wang ◽  
Henry Hu
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Thermal Treatment ◽  
Tensile Properties ◽  
Intermetallic Phase ◽  
Aged Alloy ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Die Cast ◽  
Wide Range

In this study a number of thermal treatment schemes over a wide range of temperatures between 120˚ to 350˚ C and times (30 120 minutes) have been experimented in an effort to understand the effect of thermal treatment on tensile properties of vacuum die cast modified aluminum alloy A356. The results show that, the morphology of eutectic silicon has a sound effect on the tensile properties of the tested alloy. The content of magnesium-based intermetallic phases, their morphology and distribution throughout the matrix affect the mechanical properties of the aged alloy as well. The reduction in the strengths of the alloy treated at 350°C for two hours should be at least attributed partly to the absence of the magnesium-based intermetallic phase. However the presence of sufficient amount of magnesium intermetallic phase had played important role in strengthening the alloy thermally treated at 200°C for 90 minutes.

scholarly journals Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process

2021 ◽  
Vol 75 (1) ◽  
pp. 31-37
Author(s):  
Aleksandra Pataric ◽  
Marija Mihailovic ◽  
Branislav Markovic ◽  
Miroslav Sokic ◽  
Andreja Radovanovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Cast Alloy ◽  
Casting Process ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Continuous Casting Process

Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA).

Hipping Evaluation in Cast Aluminum Alloys: Quality Index-Based Approach

2019 ◽  
Author(s):  
M. Nageswara Rao ◽  
G. Dhineshbabu ◽  
Prateek Sibal
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Hot Isostatic Pressing ◽  
Weight Ratio ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Quality Indices ◽  
Design Engineers ◽  
Cast Aluminum Alloys ◽  
Aging Conditions

Cast aluminum alloys find widespread application in the automotive and aircraft industries on account of their good castability, corrosion resistance, and high strength to weight ratio. Use of quality indices to rank cast aluminum alloys in terms of their quality has been in vogue since 1980s. Quality indices enable design engineers to select appropriate alloy condition by comparing the changes in quality with the changes in processing parameters like aging temperature and aging time. They also enable design engineers to select an appropriate alloy by way of comparing the quality obtainable with different alloy compositions. The present article highlights the effect of hot isostatic pressing (Hipping) on the quality of cast aluminum alloy 354 by using quality indices Q0, Q, and QC put forth in published literature. It has been observed that material in Hipped condition has higher value of these indices as compared to non-Hipped condition. This behavior is consistent across different aging conditions of the alloy. It is concluded that improvement accruing through Hipping of cast aluminum alloy 354 can be satisfactorily rated by using these quality indices.

Application of Vertical-Type High-Speed Twin-Roll Casting for Up-Grade Recycling and Clad Sheets Fabrication of Aluminum Alloys

2016 ◽  
Vol 877 ◽  
pp. 56-61 ◽  
Author(s):  
Shinji Kumai ◽  
Yusuke Takayama ◽  
Ryoji Nakamura ◽  
Daisuke Shimosaka ◽  
Yohei Harada ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Casting Method ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll Cast ◽  
Twin Roll

A horizontal-type twin roll casting method has been popular for producing aluminum alloy strips, however, it is characterized by a relatively low productivity (1~6 m/min). In contrast, a vertical-type high-speed twin-roll casting method possesses an extremely high productivity (60~120 m/min (1~2 m/s)) and an excellent heat extraction ability. The rapid cooling effect provided significant microstructure refinement and mechanical properties improvement in various kinds of cast aluminum alloy products. Not only “product to product recycling” but also “up-grade recycling” can be achieved by making good use of these merits. Two examples of application showing the potential of vertical-type high-speed twin roll casting method are presented. (1) Several kinds of Al-Si base alloy were cast into the strips. Not only strength and toughness but also formability was increased in the twin roll cast products. In particular, great improvement in deformability shows the potential of the twin-roll cast aluminum alloy products as substitutes for some wrought aluminum alloy products. (2) The vertical-type tandem twin-roll caster was able to fabricate a clad strip by single step. The A4045/A3003/A4045 aluminum alloy clad sheets produced by the twin-roll casting showed better mechanical properties than the conventional hot-roll bonded clad sheets.

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