Microstructural study & assessment of endurance limit through numerical simulation in TIG welded aluminum alloy (AA2219-T87).

M. Ullah; G. Y. Chohan; Q. Ali; M. A. Nasir

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Microstructural study & assessment of endurance limit through numerical simulation in TIG welded aluminum alloy (AA2219-T87).

Author(s)

M. Ullah School of Material Science & Engineering, Shandong University, P. R. China

G. Y. Chohan Department of Mechanical Engineering, University of Sargodha, Sargodha, Pakistan

Q. Ali Department of Mechanical Engineering, University of Sargodha, Sargodha, Pakistan

M. A. Nasir Department of Mechanical Engineering, University of Engineering and Technology, Taxila, Pakistan

Abstract

Tungsten Inert Gas (TIG) welding is the most common practice in aluminum alloys. It is necessary to devise a fail-safe design against fatigue failure of welded structures. Under the presence of cyclic load fatigue life is usually predicted by endurance limit of working material. In this research paper a comprehensive effort is made to investigate the endurance limit of aluminum alloy AA2219-T87. A four point rotating & bending fatigue testing machine is used to test the fatigue life estimation of the said alloy. Results obtained through experimentations are verified through numerical simulation by using software package ANSYS Workbench 14. 0. A brief microstructural study is also performed using metallurgical microscope. A gigantic contrast in grain structure is observed in different zones; formed due to TIG welding. Variation in material strength due to grains shifting from unwelded base metal (BM) to weld nugget zone (WNZ) is also studied in this research.

Publication Details

Page(s) 62-69

DOI DOI not available

Published Journal: Technical Journal, Volume: 20, Issue: 4, Year: 2015

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