“…From the outcomes, it was found that the percentage elongation of the MMCs decreased by 50.2% as the proportion of strengthening rose from 0% to 6%. These findings were comparable to those of many researchers [20, 21]. Fig.…”
The present investigation mainly concentrates on work done in order to explore physical, mechanical & tribological characteristics of Al6061 alloy reinforced with nano-sized zirconium dioxide particulates. Four casts of different percentages of reinforcement from 0 to 6 wt% in the steps of 2 are fabricated using liquid metallurgy technique (stir casting). The prepared composites later subjected to various physical, mechanical & wear tests and results were studied. The tests were carried out in accordance with the ASTM standards on the alloy and nano-composites. In the present investigation the physical and mechanical properties like density, hardness and tensile strength increased significantly with the increase in percentage of reinforcement in the matrix alloy, while the percentage elongation found to be decreased. The sliding wear tests were performed by using pin-on-disc the tribometer and results indicated that wear resistance of composites was higher. Off the four compositions, there were improved properties of composites with higher weight percent of reinforcement. Scanning Electron Microscope (SEM) micrographs was used after tensile testing to study fractured surfaces of specimens and wear morphology after wear testing. Overall the investigational outcomes are very interesting and motivates to do further more research.
“…From the outcomes, it was found that the percentage elongation of the MMCs decreased by 50.2% as the proportion of strengthening rose from 0% to 6%. These findings were comparable to those of many researchers [20, 21]. Fig.…”
The present investigation mainly concentrates on work done in order to explore physical, mechanical & tribological characteristics of Al6061 alloy reinforced with nano-sized zirconium dioxide particulates. Four casts of different percentages of reinforcement from 0 to 6 wt% in the steps of 2 are fabricated using liquid metallurgy technique (stir casting). The prepared composites later subjected to various physical, mechanical & wear tests and results were studied. The tests were carried out in accordance with the ASTM standards on the alloy and nano-composites. In the present investigation the physical and mechanical properties like density, hardness and tensile strength increased significantly with the increase in percentage of reinforcement in the matrix alloy, while the percentage elongation found to be decreased. The sliding wear tests were performed by using pin-on-disc the tribometer and results indicated that wear resistance of composites was higher. Off the four compositions, there were improved properties of composites with higher weight percent of reinforcement. Scanning Electron Microscope (SEM) micrographs was used after tensile testing to study fractured surfaces of specimens and wear morphology after wear testing. Overall the investigational outcomes are very interesting and motivates to do further more research.
“…The ductility drops by about one-third as the albite particulate content is increased from 0 to 4 wt %. These results tally with those obtained by other researchers [29,24] who also observed that the ductility of the composites decreases with increase in the reinforcement content. This decrease in ductility in comparison with the matrix alloy is a most commonly encountered disadvantage in discontinuously reinforced MMCs [30].…”
The aim of this present investigation is to carry out a comparative study of the mechanical properties of AL6061/Albite composites containing albite(NaAlSi 3 O 8) particulates, which are naturally occurring plagioclase feldspar and AL6061/graphite particulate composites containing graphite particles. The reinforcing particulates in the MMC's vary from 0% to 4% by weight. The 'vortex method' of production was employed to fabricate the composites, in which the reinforcements were poured into the vortex created by stirring the molten metal by means of a mechanical agitator. The composites so produced were subjected to a series of tests.
“…However, joining technology process selection approaches are not provided in the literature at a comprehensive level. Attempts have been made to compare various joining technologies using descriptive and/or subjective rating systems [14,15], but their usefulness to the designer who is concerned with detailed issues of technical functionality and economic performance is debatable.…”
Section: Approaches To Joining Process Selectionmentioning
There is extensive evidence to suggest that many industrial products are designed with far too many parts. Design for assembly (DFA) case studies indicate that, in many designs, large proportions of excess components are only used for joining. In many cases an excessive number of incorrect joining processes are used, possibly due to a lack of knowledge of such factors as availability, cost and functional performance of alternatives. Selection methodologies exist for some individual joining technologies. However, selecting the most appropriate technology is usually left to the designer through a non-formalized judgemental approach. This paper introduces a new methodology for identifying the most appropriate joining technology and its speci®c process variants, through both a paper-based methodology and software implementation, as a part of a proactive approach to DFA. The underlying strategy adopted is described and the selection process itself and its application to industrial case studies is demonstrated.
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