Subash Chander Guduru Books

The book explores the Taguchi method as an effective optimization technique for enhancing product quality while minimizing costs, particularly in the context of dissimilar metal joints. It focuses on the friction welding process between AISI 304 stainless steel and AISI 4140 low alloy steel, investigating the impact of parameters like friction force, forge force, and burn-off on quality metrics such as tensile strength and corrosion resistance. The study employs Analysis of Variance (ANOVA) to assess the contributions of these parameters, filling a notable gap in existing literature.

The investigation focuses on the influence of rotational speed in friction welding, traditionally viewed as less significant than other variables like friction pressure and time. It references recommendations from The Welding Institute in the UK, which indicate that effective welds can be achieved across various steel diameters at specific peripheral velocities. However, the optimal speed range for dissimilar materials, specifically AISI 304 stainless steel and AISI 4140 low alloy steel, remains unclear, prompting this study to explore its effects on the welding process.

Continuous drive friction welding can solve the problems of sensitization, dilution and solidification cracking encountered in conventional fusion welding. Friction welding does not involve melting and the weld zone undergoes thermo-mechanical working that result in a refined grain structure in the bond zone.This book an attempt is made to study the friction welding technique and all the related processes Nearly 10,000 transition joints between low alloy steel and austenitic stainless steel are required in a power plant. Normally these joints are exposed to an operating temperature of 500 degree Celcius. Due to this thermal stresses, welding stresses that arise because of differences in thermal conductivity and expansion coefficients at operating temperatures, microstructural changes because of diffusion of elements across the joint result in property degradation. Hence an experimental study is made to understand the influence of the thermal exposure on the microstructure and mechanical properties of low alloy steel and austenitic stainless steel friction welded joints is made and included

Der Einfluss der Rotationsgeschwindigkeit auf den Reibschweißprozess wird eingehend untersucht, insbesondere in Bezug auf die Kombination von austenitischem rostfreiem Stahl AISI 304 und niedrig legiertem Stahl AISI 4140. Während die Rotationsgeschwindigkeit traditionell als weniger entscheidend angesehen wird, wird hier ihre Rolle im Vergleich zu anderen Variablen wie Reibungsdruck und Schmiededruck beleuchtet. Die Forschung zielt darauf ab, den optimalen Geschwindigkeitsbereich für diese spezifische Materialkombination zu bestimmen, um die Qualität der Schweißnähte zu verbessern.