Discussion: “Prediction of Press Loads in Deep Drawing Ti–6Al–4V, Stainless Steel AISI 304 and Inconel X Alloy Under Various Conditions of Lubrication at Room Temperature” (Ray, Ranjan, and Berry, J. T., 1970, ASME J. Eng. Ind., 92, pp. 412–417)

Attempts have been made to predict loads in deep drawing Ti–6Al–4V, AISI 304, and Inconel X taking into account anisotropy and work-hardening characteristics. This has been accompanied by a comprehensive series of tests on these materials in different thicknesses (0.030–0.070 in.) using a variety of lubricants at room temperature. Draw-ability and agreement of predicted loads with those observed are seen to depend on a variety of factors. Most satisfactory agreement between prediction and observation is seen with the strongly anisotropic titanium alloy. Of the lubricants examined, polyethylene sheet and a molybdenum disulfide suspension in an acrylic resin appear to be most effective. Further work is proceeding on elevated temperature drawing.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.1410 ◽

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.

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Experimental Investigation on Warm Deep Drawing of Stainless Steel AISI 304

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.26-28.436 ◽

2010 ◽

Vol 26-28 ◽

pp. 436-442 ◽

Cited By ~ 9

Author(s):

N. Ethiraj ◽

V.S. Senthil Kumar

Keyword(s):

Stainless Steel ◽

Deep Drawing ◽

Deformation Behaviour ◽

Forming Process ◽

Aisi 304 ◽

Positive Effects ◽

Warm Working ◽

Metal Forming Process ◽

Steel Aisi ◽

Stainless Steel Aisi

Deep drawing is one of the most widely used metal forming process to produce sheet metal parts especially in automobile industries. Warm working is the plastic deformation of metal at temperatures below the temperature range for recrystallization and above the room temperature. In this investigation, 1.0mm thick circular specimen of stainless steel AISI 304 were warm deep drawn and the influence of temperature on the deformation behaviour of material and the drawing loads which is required to draw the component was studied. The results show that the warm working has positive effects like reduced drawing load, negligible amount of increase in thinning and thickening of a drawn component when compared to the conventional drawing and also there is no necking or cracking occurs due to the temperature influence.

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