Summary on Creep Behavior of Discontinuous SiC-Al composites Essay

Summary on Creep Behavior of Discontinuous SiC-Al composites - Essay Example The first experiment tested compressed creep on SiC with 3-5 wt. percentages of Li at a temperature of 505-866k. The results showed that Li increases the strengthening power of SiC and its wetting behavior. The second experiment tested the creep behavior of SiCw and SiCp covered with aluminum alloy at a temperature of 505-644k. The results showed that both composites were steady but SiCW was more resistant to creep compared to SiCp. The results were because of the variations in the components load bearing abilities, their strengths and the applied temperatures. The conducted experiments revealed that the quality of creep rates depend on the applied temperatures and stress (Mohamed, Park & Lavernia 22). The article also used the shear lag method to test the creep rate of discontinuous composites by applying stress and geographic parameters. In this method, the composite has short fibers inserted in the creeping matrix; the shear transports the load from the matrix to fiber and this ap proach applies creep power law. This method is efficient in transferring the load from matrix to fiber and handling stress level within the fiber. ... In the experiment, the composite phase acted as a regular aligns and there was periodic array of fibers. The experiment applied the creep power law by ensuring that reinforcement phase remains elastic (Mohamed, Park & Lavernia 26). The results indicated that matrix develops higher stress, which reduces composites creep rates. It also showed that geometry arrangements affect the quality of the creep rate. Indeed, the results note that creep law favors the Ag-40wt. percentage composites only but not the composites of SiC-Al (Mohamed, Park & Lavernia 27). Considering the obtained results, the article explains the deformation models using dislocation motion. It analyses whether similar dislocation processes can be applicable for both DS alloy creep and the SiC-Al composites creep. In addition, the article also evaluates successfully the characteristics of deformation process on DS alloys and SiC-Al composites. The article highlights the strain exponent of creep and identifies the followi ng assumptions. Firstly, the high stress exponent and variations results from threshold stress. Additionally, the threshold stress and strength applied on the creep depends on applied stress and lastly, the activation energy for SiC-Al composites and DS alloys are similar (Mohamed, Park & Lavernia 30). The article concludes that SiC-Al composites and DS alloys have similar creep behaviors regardless of their stress exponent and activation energies. Importantly, the article identifies that shear log assumptions on the creep behavior of SiC-al are inconsistence. Indeed, the study offers the similarities in the creep behavior among composites, the evidential calculations and dissimilarities among activation

Leadership approach Essay Example | Topics and Well Written Essays - 2500 words

Leadership approach - Essay Example the aforementioned students, the animal owners who seek the services of the veterinary college as well as the clinicians. The Problem: Given the considerable job descriptions of the staff, coupled with the lack of resources and the need to provide excellent services, the staff finds itself in the classic low morale conundrum; too much work and effort required for a job description that is become less enviable by the day. This, in short, can be categorized as the crux of the problem that I face under the leadership aspect of my role as the finance manager. ... The major weakness of this concept is ironically related to its major strengths in that the rather malleable nature of production does not allow the firm to establish a solid ground in any of the different businesses that it participates in i.e. its becomes somewhat of a jack of all trades and master of none. Due to this lack of immovability, the firm is not able to continue a specific production practice for a large period of time, hence, is unable to ascertain best production practices and any other cost cutting techniques, thus, it always produces at a level that has to be considered in optimal for the firm. (Yinghong, 2006) McDonald’s is a pertinent example of the correct use of moving competencies as they have been able to strike the perfect balance between the usability of moving competencies and defining their basic company objectives and areas of expertise. Therefore, despite the fact that McDonald’s is expanding both is scale of operations and in its product ra nge, it is still intrinsically a fast food joint which it has been able to maintain due to its best practices and strong adamancy on quality assurance. From this description, it can be easily surmised that the need of the hour for the manager is to implement the system of moving competencies in a way that would oversee the creation of synergies and the institution of best practices in the form that ‘every job is done by that specific person who does it best’. Therefore, the creation of conjoined skills development becomes a necessity and the onus lies on the finance manager to institute the change that is needed for the creation of an open learning and