OPTIMIZATION OF THE PROCESS PARAMETERS OF FRICTION-WELDED St-Al JOINTS

Küçük Resim Yok

Tarih

2019

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Inst Za Kovinske Materiale I In Tehnologie

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

Friction welding is a solid-state welding process. applicable to similar and dissimilar ferrous and non-ferrous metals. Combining aluminium and steel parts is one of the most suitable methods for obtaining cheaper and lightweight products. Due to their different properties, compositions of these materials provide multiple advantages. In the present study, stainless-steel and aluminium (St-Al) parts were friction welded with an aim to optimize the process parameters. The joints obtained with various process-parameter combinations were subjected to tensile tests. Empirical relationships were developed to predict the strength of the joints using the RSM (the response surface methodology) and the coherency of the model was tested. The tensile properties. microhardness variations, scanning-electron-microscopy (SEM) examinations, energy-dispersive-spectroscopy (EDS) and X-ray diffraction (XRD) analyses of the welded specimens were evaluated. Additionally, the tensile-strength test results were analyzed using analysis of variance (ANOVA) with a confidence level of 95 % to find a statistically significant difference. The ANOVA analysis revealed that the friction pressure/friction time ratio had a greater influence on the tensile strength of the joints than the upset pressure/upset time ratio. However, it was found that some of the stainless-steel/aluminium welds had a poor strength due to the accumulation of the alloying elements at the joint interface.

Açıklama

Anahtar Kelimeler

St-Al Joints, Friction Welding, Tensile Strength, Response Surface Methodology, Stainless Steels Aisi-304, 5052 Aluminum-Alloy, Interface Properties, Welding Process

Kaynak

Materiali In Tehnologije

WoS Q Değeri

Q4

Scopus Q Değeri

Q3

Cilt

53

Sayı

2

Künye