Theoretical Prediction of Thickness Distribution on Warm Deep Drawn AISI 304 Steel Cup

2015 ◽  
Vol 766-767 ◽  
pp. 974-981
Author(s):  
N. Ethiraj ◽  
P. Ganesh ◽  
V.S. Senthil Kumar
Keyword(s):  
Deep Drawing ◽  
Room Temperature ◽  
Thickness Distribution ◽  
Research Work ◽  
Austenitic Stainless Steels ◽  
304 Stainless Steel ◽  
Recrystallization Temperature ◽  
Aisi 304 ◽  
Warm Deep Drawing ◽  
Aisi 304 Steel

Warm deep drawing is a non-conventional deep drawing process which is performed by applying heat in the conventional deep drawing, at the same time keeping the blank below the recrystallization temperature. Austenitic stainless steels like AISI 304 are widely used in food and automotive industries. Most of the current research work in warm deep drawing has been focussing on experimental and numerical simulation only. In this work, a new methodology is proposed to calculate the thickness distribution of the warm deep drawn circular cup from AISI 304 stainless steel sheet of 1.0 mm thickness analytically at temperatures ranging from room temperature to 300°C. The results of the theoretical approach show a reasonably good correlation with the experimental results.

Analysis of Thickness Strain Prediction in Warm Deep Drawing of Ti-6Al-4V Alloy

2014 ◽  
Vol 980 ◽  
pp. 52-56
Author(s):  
Nitin Kotkunde ◽  
Aditya D. Deole ◽  
Amit Kumar Gupta ◽  
Swadesh Kumar Singh
Keyword(s):  
Deep Drawing ◽  
Room Temperature ◽  
Fe Simulation ◽  
Thickness Distribution ◽  
Austenitic Stainless Steels ◽  
Alloy Sheet ◽  
Fe Analysis ◽  
Yield Model ◽  
Thickness Strain ◽  
Good Agreement

In this work, deep drawing experiments have been performed in order to study formability of Ti-6Al-4V alloy sheet at temperature ranging from room temperature to 4000C. It is found that below 1500C, formability of the material is very poor and above 1500C till 4000C, limiting draw ratio (LDR) is found to be 1.8 which is substantially lesser than other structural alloys such as austenitic stainless steels. In order to understand qualitative aspects of formability, thickness distribution of drawn cup has been evaluated experimentally over a temperature range of 1500C - 4000C. Additionally, Finite Element (FE) analysis is done using a commercially available code Dynaform version 5.6.1 with LS-Dyna version 971 solver. 3-Parameter Barlat yield model is used for FE analysis. Predicted thickness distribution using FE simulation is in good agreement with experimental results.

scholarly journals EVALUATION OF THE METALLURGICAL PARAMETERS EFFECT ON TENSILE PROPERTIES IN AUSTENITIC STAINLESS STEELS

2017 ◽  
Vol 23 (2) ◽  
pp. 111 ◽  
Author(s):  
Andrea Di Schino ◽  
Maria Richetta
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
304 Stainless Steel ◽  
Strengthening Effect ◽  
Regression Equations ◽  
Aisi 304 ◽  
Solid Solution Strengthening ◽  
Cold Rolling And Annealing

<p>Even if relations predicting the mechanical properties on bars of austenitic stainless steels are already available, but no systematic works was carried out in order to predict mechanical properties in after cold rolling and annealing.   The tensile properties of a large number of cold rolled and annealed AISI 304 stainless steel are here correlated with their chemical composition and microstructure. Quantitative effects of various strengthening mechanisms such as grain size, d– ferrite content and solid solution strengthening by both interstitial and substitutional solutes are described. Interstitial solutes have by far the greatest strengthening effect and, among the substitutional solutes, the ferrite – stabilising elements have a greater effect than the austenite – stabilising elements. Regression equations are developed which predict with good accuracy the proof stress and tensile strength in AISI 304 stainless steels.</p>

Improvement of Wall Angle in AISI 304 Stainless Steel Cup using Five Stage Single Point Incremental Forming

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
D. Suresh Kumar ◽  
N. Ethiraj
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Research Work ◽  
Single Stage ◽  
304 Stainless Steel ◽  
Forming Process ◽  
Wall Angle ◽  
Aisi 304 ◽  
Metal Forming Process ◽  
Stage Process

Incremental forming is a non-conventional metal forming process which is widely used to produce the customized parts especially in medical and aerospace industries. One of the challenges encountered in the single stage process is the maximum wall angle of the component that can be formed to a maximum possible depth without fracture. Many strategies have been tried by the researchers in the past to overcome this limitation. The aim of this research work is to investigate the effect of 5 stage incremental forming process in improving the formation of maximum wall angle to a possible height which is not possible in single stage incremental forming. Also, the different strain measurements are carried out to identify the region at which the fracture is likely to occur in the produced part. It is observed from single stage incremental forming process for a wall angle of 64, max. depth of 45mm is achieved in the part produced. The current 5 stage incremental forming process reached the max. height of 54 mm with a wall angle of 76 successfully. The maximum thickness strain of 75% is observed at a distance of 18mm from the bottom end of the flange of a formed component.

Investigation on Formability of AISI 304 Circular Cups by Warm Deep Drawing

2011 ◽  
Vol 418-420 ◽  
pp. 1410-1417
Author(s):  
N Ethiraj ◽  
V.S Senthil Kumar
Keyword(s):  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Draw Ratio ◽  
Room Temperature ◽  
Aisi 304 ◽  
Warm Working ◽  
Steel Aisi ◽  
Different Diameters ◽  
Stainless Steel Aisi

Deep drawing is one of the sheet metal forming processes used widely in industries like automobile, aerospace etc. In drawing operation, the limiting draw ratio (LDR) is used as an index of drawability of a material. In this investigation, stainless steel AISI 304 grade blanks of 1.0 mm thickness with different diameters are drawn into a circular cups in single stage. The experiments were conducted at room temperature as well as at temperatures 100oC, 200oC, and 300oC. The LDR values obtained in each condition were analyzed. The experimental results show that there is a significant improvement in LDR values by warm working.

Studies on Thin Film Oxide Formation on GTA Welded AISI 304 & AISI 310S Exposed at 600°C

2012 ◽  
Vol 584 ◽  
pp. 131-135 ◽  
Author(s):  
Jeet Kumar Kesharwani ◽  
Abhilash Paliwal ◽  
Kamir Kothari ◽  
K. Devendranath Ramkumar ◽  
N. Arivazhagan ◽  
...  
Keyword(s):  
Thin Film ◽  
Research Work ◽  
Weld Zone ◽  
Austenitic Stainless Steels ◽  
Tensile Tests ◽  
Air Oxidation ◽  
Oxide Formation ◽  
Aisi 304 ◽  
Gas Tungsten Arc ◽  
Marine Applications

In this research work, an attempt was made to study the thin film oxide formation on the dissimilar gas tungsten arc welded austenitic stainless steels of grades AISI 304 and AISI 310S using E309L filler wire. These combinations are widely used in power plant and marine applications. An assessment was carried out to estimate the metallurgical, mechanical properties of the weldment. Tensile tests revealed that the fracture occurred at the weld zone. In addition, Vickers Micro-hardness tests were performed across the length of the weldment. Furthermore, hot corrosion studies were performed on different regions (heat affected zones, weld zone and parent metal zones) of the weldment subjected to air oxidation at 600°C. It was revealed from thermogravimetric analysis that there was weight loss in the heat affected zone of the AISI 310S side after 50 cycles. The thin film oxide layer formation on various zones of the weldment was examined using the combined techniques of optical microscopy, XRD and SEM/EDAX analysis.

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