Comprehensive review of various corrosion behaviours on 316 stainless steel

Corrosion is a destructive process that converts the pure metal into a chemically stabled form by hydroxide or sulphide and it is a slow process of destruction on the material by the chemical or electrochemical reaction in the environmental space. This kind of destruction has been typically produced from oxides or salt content on the material and it results in distinctive orange coloration. The classifications of corrosion act on atmospheric air and liquids as well as on contact of two solids. To resist the corrosion rate, stainless steel 316 has been chosen because of the presence of 2-3% molybdenum content and the presence of molybdenum plays a vital role in corrosion resistance. In this study, literature related to various works has been reviewed to explain the corrosion behaviour on cavitation, crevice, electrochemical, erosion, fatigue, galvanic, uniform, pitting, and stress corrosion which act on 316 stainless steel. In the present work, several coating processes and the additives, that have been added to SS 316 to enhance the outcomes according to various corrosion causes, are discussed

Electrical Discharge Machining of Al (6351)-5% SiC-10% B 4

The goal of the present experimental work is to optimize the electrical discharge machining (EDM) parameters of aluminum alloy (Al 6351) matrix reinforced with 5 wt.% silicon carbide (SiC) and 10 wt.% boron carbide (B4C) particles fabricated through the stir casting route. Multiresponse optimization was carried out through grey relational analysis (GRA) with an objective to minimize the machining characteristics, namely electrode wear ratio (EWR), surface roughness (SR) and power consumption (PC). The optimal combination of input parameters is identified, which shows the significant enhancement in process characteristics. Contributions of each machining parameter to the responses are calculated using analysis of variance (ANOVA). The result shows that the pulse current contributes more (83.94%) to affecting the combined output responses

Dry Sliding Friction and Wear Studies of Fly Ash Reinforced AA-6351 Metal Matrix Composites

Fly ash particles are potentially used in metal matrix composites due to their low cost, low density, and availability in large quantities as waste by-products in thermal power plants. This study describes multifactor-based experiments that were applied to research and investigation on dry sliding wear system of stir-cast aluminum alloy 6351 with 5, 10, and 15 wt.% fly ash reinforced metal matrix composites (MMCs). The effects of parameters such as load, sliding speed, and percentage of fly ash on the sliding wear, specific wear rate, and friction coefficient were analyzed using Grey relational analysis on a pin-on-disc machine. Analysis of variance (ANOVA) was also employed to investigate which design parameters significantly affect the wear behavior of the composite. The results showed that the applied load exerted the greatest effect on the dry sliding wear followed by the sliding velocity

Performance Evaluation of Abrasive Water Jet Machining on Banana Fiber Reinforced Polyester Composite

This work deals with the investigation of Abrasive Water Jet Machining (AWJM) on banana fiber reinforced polyester composite. The composite is prepared with 20 wt. % of fiber through hand layup method followed by compression molding. Experiments are conducted to assess the influence of each input parameters on the output responses namely surface roughness (Ra) and kerf angle. The study is performed by varying the water pressure, traverse speed (TS), and standoff distance (SD). From the experiments, it is observed that the standoff distance contributes more on affecting Ra by 60.63% and kerf angle by 74.80%. The suitable cutting parameters are suggested for achieving quality output and the cut surface morphology is observed through Scanning Electron Microscopic (SEM) images

<span style="font-size:11.0pt;mso-bidi-font-size: 10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-ansi-language:EN-GB;mso-fareast-language: EN-US;mso-bidi-language:AR-SA" lang="EN-GB">Production and characterization<span style="mso-bidi-font-weight:bold"> of hybrid aluminum matrix composites reinforced with boron carbide (B₄C) and graphite</span></span>

667-670Aluminum matrix composites have been reinforced with Boron carbide (B4C) and Graphite (Gr) for increasing mechanical properties and wear resistance. Additions of Boron carbide (B4C) improves both strength and wear resistance of composites, but addition of B4C alone in higher amounts makes the composite brittle and machining difficult. Thus, B4C can be advantageously used as a reinforcement to overcome the problem of strength reduction in Gr reinforced composites, resulting in hybrid composites. Aluminum matrix composites reinforced with up to 12 wt % B4C and 3 wt % Gr particulates are investigated in the present study. Hybrid composites exhibit better wear characteristics compared to aluminium alloy. Wear tests were carried out with loads varying from 10 to 40 N and sliding distances of 500 and 1000 m with a constant sliding speed of 1m per second. An interaction between load and sliding distance was observed in the composites which may be attributed to the presence of Gr particulates. Decrease in wear with an increase in speed and vice versa were observed with both load and sliding distance. Hardness of the composites measured using Vicker’s Hardness Tester indicated that hardness increased with increasing percent of B4C reinforcement while addition of Gr imparted the lubrication effect in the composites