Informatics Publishing Limited

P. Prabhakara Rao ¹, G. Chakravarthy ², A. C. S. Kumar ³, B. Balakrishna ⁴

Affiliations
1 V. R. Siddhartha Engineering College, Vijayawada, IN
2 Murthy Institute of Technology & Science, Keesara, IN
3 JNTU, Hyderabad, IN
4 JNTU Pulivendula, Kadapa, IN

Abstract

Residual stress in aluminum 7% silicon, 0.5%mg alloy castings has been evaluated by X-ray diffraction. Straight bar and flanged bar castings are produced in green, sand mould, sodium silicate-co₂ mould and EPC mould, specimens are taken from different location of castings and these specimens are analyzed for residual stresses in X-ray diffractometer. Flanged bar castings have more residual stresses then straight bar castings. Most of the stresses are tensile in nature. As for the type of mould is concerned, the residual stresses are increasing in the order of green sand mould, sodium silicate-co₂, mould and EPC mould, residual stress in the flanged bar castings is not limited to the location of casting.

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Ishtiaq Ahmed Khan ¹, Ravinder Reddy ², A. C. S. Kumar ³, Narander ⁴

Affiliations
1 JNTUH, Mech. Dept, CBIT, Hyd, IN
2 Mech. Dept, CBIT, Hyd, IN
3 JNTUH College of Engg., IN
4 Concurrent Analysis Pvt. Ltd., IN

Abstract

The welding of Al 6061 and SS 304 is susceptible to intermetallic layer formation. The interface properties are degraded as intermetallic thickness increases and the formation of intermetallic compounds strongly depends on local temperature attained during the welding process. The formation of intermetallic layer is responsible for brittle failure of components. In the present study a thermo mechanical model was developed to predict temperature distribution and stress during friction welding process of Al 6061 and SS 304. Temperature dependent material properties are taken into account for analysis. The FE analysis results are compared with experimental results.

Keywords

Finite Element Analysis, Friction Welding.

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