Evaluation of Various Dental Casting Alloys and Techniques-An Overview

Sharma, Abhishek; Kapoor, Karan; Chauhan, Abhinav; Kanwar, Manisha

doi:10.5958/2320-5962.2014.00014.x

Cited by 4 publications

(4 citation statements)

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“…In addition, the SiC particles are also preheated to improve their wettability. This process breaks the gas layers surrounding the particles and increases the strength of the specimens [31].…”

Section: Microstructural Studiesmentioning

confidence: 99%

Enhancing the fatigue strength of stir-casted Al7075-SiC composites through heat treatment and shot peening

Raghuvaran,

Suresh,

Narasimharaj

et al. 2023

Phys. Scr.

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An attempt has been made in the present study to analyze the impact of shot peening on fatigue strength of Al-SiC (8 wt.%) composites. Composite samples prepared using stir casting method is machined to ASTM E466 standards and a portion of them are exposed to T6 heat treatments. Shot peening is done on various combinations of specimens and fatigue tests are carried out and compared. Fatigue strength of Al7075 is 156.5 MPa and it is found to be increased to 165.8 MPa for heat treated and shot peened Al-SiC composites. Design expert software is used for design of experiments in order to optimize the process parameters and enhance the fatigue strength of the specimens further. Fatigue strength of the specimens was increased to 174 MPa on repeating the test with optimized experimental parameters. The fatigue test results revealed that heat treated cum shot peened Al-SiC composite exhibited maximum results than other samples. Surface residual stress of the specimens are measured and is found that shot peening increases the compressive residual stress on the surface of the specimen. Surface roughness of the specimen is increased on shot peening. Microstructural analysis is done on the specimens to find the impact of shot peening on the surface of the composite specimens. The strengthening mechanisms of the composite samples are discussed with the help of microstructural images.

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Section: Microstructural Studiesmentioning

confidence: 99%

Enhancing the fatigue strength of stir-casted Al7075-SiC composites through heat treatment and shot peening

Raghuvaran,

Suresh,

Narasimharaj

et al. 2023

Phys. Scr.

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“…Such classic materials have excellent specific tensile strength and are ideal choices for many conventional engineering requirements. Results have shown that composites are a good substitute for metal alloys and ceramics in today's market [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Treatment and Natural Aging Behavior of Peak-Aged Eutectoid Steel Powder-Reinforced Al 7075 Matrix Composites

Hegde,

Birur Manjunathaiah,

Sharma

et al. 2024

J. Compos. Sci.

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The current work focuses on the natural aging phenomenon of a eutectoid steel powder-(0.8 wt.%) reinforced Al-Zn-Mg (Al 7075) alloy, which was subjected to a hybrid heat treatment. The hybrid treatment comprises the aging treatment of a matrix and the conventional treatment of a steel reinforcement in a single stretch on the stir cast composite. This material finds uses in space and transportation applications. The hybrid treatment consists of a conventional heat treatment cycle to obtain pearlite, bainite, and martensite phases in steel powder, followed by an age-hardening treatment for the Al 7075 matrix. This hybrid heat treatment resulted in improvements in the hardness and strength over the conventional aging treatment. The peak-aged hybrid specimens were subjected to natural aging in an open atmosphere for a continuous duration of 25 weeks to study the stability of the properties after peak aging. Tests of the mechanical properties such as the hardness and tensile strength along with microstructure analysis were carried out. During natural aging, the hardness of composites decreases irrespective of the quantity of the reinforcement in the composites and the type of reinforcement phase alteration during hybrid heat treatment. Also, the composites subjected to hybrid heat treatment show better resistance to natural aging compared to the conventionally aged samples. Within the group, the hybrid-treated martensite formed into a composite with 6 wt.% reinforcement showed only a 4% reduction in hardness during natural aging, which is an indication of a decent level of resistance to natural aging.

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“…Again the slurry is heated to a liquidus state and mixed thoroughly. Nowadays, this two-step mixing process has used in the fabrication of aluminium because of more uniform microstructure as compared of conventional stirring [17].A recent development in stir casting is three step stir casting for the fabrication of nano particle reinforced composite. In this method, first, the Al particles and reinforcement are mixed using ball milling process to breakdown the initial clustering of nano particles.…”

Section: Introductionmentioning

confidence: 99%

Investigation On Improved Thermal Conductivity Of AA6061 By Reinforcing Hybrid Ceramic Particulates Using Stir Casting Method

Rajan,

Santhosh,

Thilak

et al. 2024

eatp

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Aluminium MMCs are replacing conventional aluminium alloys in various domains exclusively in transportation. The basic scientific concept here is to improve the thermal conductivity of the conventional aluminium alloys. Stir casting process is mainly used for manufacturing of particulate reinforced metal matrix composite (PMMC). Manufacturing of aluminium alloy based casting composite by stir casting is one of the most economical methods of processing MMC. Properties of these materials depend upon many processing parameters and selection of matrix and reinforcements. Advancements of manufacturing technology would allow incorporating the Aluminium oxide (Alumina) and Graphite (c) fillers of different/varied and also equal volume with molten aluminium. Scanning Electron Microscopy and EDX are necessary to study the various percentages of particle distribution in Al matrix system. Then temperature distribution along the extended surface (fins) would be determined by pin fin apparatus. This is used to calculate average temperature of fins.

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Evaluation of Various Dental Casting Alloys and Techniques-An Overview

Cited by 4 publications

References 0 publications

Enhancing the fatigue strength of stir-casted Al7075-SiC composites through heat treatment and shot peening

Enhancing the fatigue strength of stir-casted Al7075-SiC composites through heat treatment and shot peening

Hybrid Treatment and Natural Aging Behavior of Peak-Aged Eutectoid Steel Powder-Reinforced Al 7075 Matrix Composites

Investigation On Improved Thermal Conductivity Of AA6061 By Reinforcing Hybrid Ceramic Particulates Using Stir Casting Method

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