Indian Journal of Engineering & Materials Sciences

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Experimental and Finite Element Studies of Stretch Forming Process for ASS 316L at Elevated Temperature


Affiliations
1 Department of Mechanical Engineering, KG Reddy College of Engineering & Technology, Hyderabad 500 075, India
2 Department of Mechanical Engineering, JNTUH, Hyderabad 500 072, India
3 D.O.F.S., DRDL, Hyderabad 500 058, India
4 Department of Mechanical Engineering, GRIET, Hyderabad 500 090, India
5 Department of Mechanical Engineering, GLA University, Mathura 281 406, India
 

Austenitic stainless steel 316 L grade is a material having extraordinary mechanical properties, low cost and easily available. This is the reason it was used in various industrial and nuclear applications. In the present work, ASS 316L nakazima specimens are stretched under hot forming conditions (750°C, 825°C and 900°C) at a constant strain rate (0.1s-1) along with three different orientations. These six types of nakazima specimens were used to know the formability behaviour of the material with the help of forming limit diagrams (FLD) obtained by the stretch forming process. A smaller change in Punch load and an increase in displacement were observed, which indicates the formability improvement of ASS 316L sheet metal with the increase in temperature. In addition, ABAQUS 6.13 computer code was applied for the prediction of formability from 750°C to 900°C. To improve the accuracy of the simulation, a number of integration points were accrued within the thickness direction, limiting dome height (LDH).The ductile fracture was observed from SEM images for all the temperatures. A close agreement was found between experimental and simulated results.

Keywords

Austenitic Stainless Steel 316L, Stretching, Hot Forming, Forming Limit Diagram, Limiting Dome Height, Finite Element Analysis.
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  • Experimental and Finite Element Studies of Stretch Forming Process for ASS 316L at Elevated Temperature

Abstract Views: 61  |  PDF Views: 51

Authors

Baloji Dharavath
Department of Mechanical Engineering, KG Reddy College of Engineering & Technology, Hyderabad 500 075, India
M. T. Naik
Department of Mechanical Engineering, JNTUH, Hyderabad 500 072, India
Anand Badrish
D.O.F.S., DRDL, Hyderabad 500 058, India
Tanya Buddi
Department of Mechanical Engineering, GRIET, Hyderabad 500 090, India
Kuldeep K. Saxena
Department of Mechanical Engineering, GLA University, Mathura 281 406, India

Abstract


Austenitic stainless steel 316 L grade is a material having extraordinary mechanical properties, low cost and easily available. This is the reason it was used in various industrial and nuclear applications. In the present work, ASS 316L nakazima specimens are stretched under hot forming conditions (750°C, 825°C and 900°C) at a constant strain rate (0.1s-1) along with three different orientations. These six types of nakazima specimens were used to know the formability behaviour of the material with the help of forming limit diagrams (FLD) obtained by the stretch forming process. A smaller change in Punch load and an increase in displacement were observed, which indicates the formability improvement of ASS 316L sheet metal with the increase in temperature. In addition, ABAQUS 6.13 computer code was applied for the prediction of formability from 750°C to 900°C. To improve the accuracy of the simulation, a number of integration points were accrued within the thickness direction, limiting dome height (LDH).The ductile fracture was observed from SEM images for all the temperatures. A close agreement was found between experimental and simulated results.

Keywords


Austenitic Stainless Steel 316L, Stretching, Hot Forming, Forming Limit Diagram, Limiting Dome Height, Finite Element Analysis.

References