Grading of Spot Welding Electrode Material Properties Using AHP

Abstract

An objective of this research is to rank the essential property required for spot welding material selection. Total ten attributes namely Electrical conductivity, Thermal conductivity, Rockwell Hardness, Wear resistance, Density, Cost, Melting point, Percentage Elongation, Yield Strength and Ultimate Tensile Strength were considered for the purpose of selection of the electrode Material. In order to select appropriate spot welding electrode, authors have studied various Copper alloys having equally good properties. The selection of essential properties was done using Analytical Hierarchy Process (AHP). Experimental work have been carried out on Cu-Cr-Zr material using universal tensile and found that the strength and hardness increases with alloying element, however percentage elongation decreases by 50 % as compared to pure Cu. While performing AHP, the authors found that electrical conductivity, wear resistance, thermal conductivity and Rockwell hardness proved to be the most crucial parameters. Wear of electrode material also affects on current density and performance characteristics of spot welding process and makes it more expensive. The ranking of the property thus provide an input to apply various Multi-Attribution Decision Making (MADM) techniques for selection of the appropriate material for spot welding application. This work is recommended to spot welding electrode manufacturers as well as end users in order to prioritize the properties for selection of spot welding electrode with longer life and good weld quality.

Wear Performance of Cu–Cd, Cu–Be and Cu–Cr–Zr Spot Welding Electrode Materials

“…The authors, Bachchhav et al, used the analytical hierarchy process (AHP) to rank the material properties of spot-welding electrodes. They discovered that high electrical conductivity, thermal conductivity, and wear resistance are the most predominant properties out of the 10 characteristics considered [6]. However, conducting this analysis using a single material presents several challenging obstacles.…”

Selection of Spot Welding Electrode Material by Preference Ranking Organization Method for Enrichment Evaluation, VIKOR and WASPAS Methods

“…An important attributes were considered based on results obtained through AHP analysis are electrical conductivity (EC) in, thermal conductivity (THC), Rockwell hardness (RH), yield strength (YS), density (D), cost (C), wear resistance (WR). [3] The values of the attributes for the selected materials were collected from open literature and depicted in Table 2. [3,[19][20][21][22] Determining the Weight of W j of the Criteria Let x ij be performance score of i th alternative of j th parameter The relative significance of each criterion is calculated as follows:…”

“…Analytic hierarchy process (AHP) is an effective method of correctly assessing the conflicting data by a pairwise judgment between the attributes under consideration. [1][2][3][4] Attempts have been made to rank spot welding electrode material properties using AHP and found that high electrical conductivity, thermal conductivity and wear resistance are most predominant properties amongst all ten attributes under consideration. [3] AHP were performed for various applications such as critical property assessment novel brake pad material selection [5,6] and grade classification of bio-lubricants.…”

“…[1][2][3][4] Attempts have been made to rank spot welding electrode material properties using AHP and found that high electrical conductivity, thermal conductivity and wear resistance are most predominant properties amongst all ten attributes under consideration. [3] AHP were performed for various applications such as critical property assessment novel brake pad material selection [5,6] and grade classification of bio-lubricants. [7,8] Several researchers have worked on AHP in conjunction with various subjective and objective multi-criteria decision making methods.…”

The Influence of Manufacturing Technology on the Properties of Chromium-Bronze Electrodes for Contact Relief Welding of Reinforcing Rods

“…Необходимым условием для осуществления процесса сварки выступает более высокое электросопротивление на границе свариваемых частей изделия в зоне их контакта. выполняют три основные функции: передают давление при сжатии деталей, подводят к ним электрический ток и отводят тепло, выделяющееся в процессе сварки.Среди многочисленных марок бронз[2,3,7], применяемых для изготовления электродов, выделяется группа медных сплавов с малым (0,3-1 %) содержанием легирующих элементов (кад-миевые, хромистоциркониевые, хромистые бронзы)[6]. Эти бронзы обладают близкой электрои теплопроводностью в сравнении с чистой медью.…”