Formability Limit Diagrams of Extra-deep-drawing Steel at Elevated Temperatures

Goud, R. Raman; Prasad, K. Eswar; Singh, Swades Kumar

doi:10.1016/j.mspro.2014.07.014

Cited by 18 publications

(14 citation statements)

References 9 publications

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“…Laurent et al 22 reported that formability improves above die temperatures of 150°C for Al5754. Some of the recently published works also deal with the warm forming research on aluminum alloys [23][24][25][26][27][28] and steels [29][30][31][32][33] with a focus on specific applications. It seems from the literatures that the technology of warm forming is limited to laboratory research only.…”

Section: Introductionmentioning

confidence: 99%

Elevated temperature forming limit strain diagrams of automotive alloys Al6014-T4 and DP600: A case study

Saxena

Drotleff

Mukhopadhyay

2016

The Journal of Strain Analysis for Engineering Design

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The press formability of the automotive materials such as aluminum alloys, magnesium alloys and steels is influenced by forming temperatures. While adjusting the temperature level of die, punch and binder, the lightweight materials can successfully be formed, especially for complex automotive body parts. The objective of this case study is to determine the forming limit curves of Al6014 and DP600 alloy sheet at elevated temperatures in specific range of 200°C and 250°C suitable for press operation in long-run production cycles. The focus is set on Al6014 and DP600 as these two materials are widely used in automotive panels due to their high strength and lightweight and improved resistance to corrosion. DP600 is sometimes preheated before forming to avoid cracks. Thus, it is essential to study the effect of preheating temperature on the formability. Experiments were conducted at forming temperatures of 200°C and 250°C and at low punch speed. The measurement of train distribution was carried out online using digital image correlation with the optical deformation measurement system GOM Aramis. Both Al6014 and DP600 alloys were found to have good drawability and stretchability. It was found that for Al6014, the forming limit curve level increases with temperature. On the contrary, DP600 showed slight decrease in the level of forming limit curve as temperature was increased. Warm formability for these alloys was further characterized through part depth and percentage thinning measurements.

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Section: Introductionmentioning

confidence: 99%

Elevated temperature forming limit strain diagrams of automotive alloys Al6014-T4 and DP600: A case study

Saxena

Drotleff

Mukhopadhyay

2016

The Journal of Strain Analysis for Engineering Design

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“…For stretching the EDD steel sheets suitable die, hemispherical punch and hydraulic press were used. The formability limit diagrams and fracture limit diagrams were determined at room temperature 150 0 C, 300 0 C and 450 0 C for EDD steel sheets [21].…”

Section: Literature Reviewmentioning

confidence: 99%

“…In this study we have been interested in finding out how the thickness distribution, temperature distribution and vonmises stresses along with limit strains in the FE models are related to the experimental limit strains determined by Raman Goud et al [21]. In this study, commercial dynamic-explicit FE code.…”

Section: Finite Element Simulationmentioning

confidence: 99%

Finite Element Simulation of Stretching Operation of EDD Steel at Different Temperatures

Chadaram¹,

Vishnu²,

Limbadri³

et al. 2015

Materials Today: Proceedings

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“…Gouda et al. 23 conducted tests on extra-deep drawing steels. In the study, the forming limit diagram (FLD) was generated at 20°C, 150°C, 300°C, and 450°C, and the final mechanical properties were analyzed.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Effects of rapid conductive heating and passive cooling with cold dies on hot-forming formability and final mechanical properties of boron steel sheets

Koçar

Livatyalı

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper is focused on the assessment of hot-forming limits and post-process properties of the 22MnB5 steel sheets heated to 950°C using rapid conductive heating, which is proposed as a fast and efficient method. An experimental axisymmetric bulging die set appropriate for conductive heating was designed and manufactured. Stretch-forming tests were conducted on rectangular specimens with three different widths until failure using dies at room temperature. The die set at room temperature performed passive cooling as well as deformation. The tests showed the limits of formability. Microhardness and microstructure analyses of the formed steel proved the bainitic–martensitic nature obtained at the end of the process. The results show good agreement with the published data collected by conventional furnace heating, which is a slower and more inefficient process.

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Formability Limit Diagrams of Extra-deep-drawing Steel at Elevated Temperatures

Cited by 18 publications

References 9 publications

Elevated temperature forming limit strain diagrams of automotive alloys Al6014-T4 and DP600: A case study

Elevated temperature forming limit strain diagrams of automotive alloys Al6014-T4 and DP600: A case study

Finite Element Simulation of Stretching Operation of EDD Steel at Different Temperatures

Effects of rapid conductive heating and passive cooling with cold dies on hot-forming formability and final mechanical properties of boron steel sheets

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