The micromechanics of the formability a lean duplex TRIP steel was investigated using Synchrotron X-Ray Diffraction (S-XRD) measurements and Crystal Plasticity Finite Element Modeling (CPFEM). Specifically, effect ferrite phase on reduction stress concentrations in martensite influence austenite texture distribution deep-drawn were studied comparison to case. A series deep-drawing processes car...

The present work was conducted to elucidate the influence of inclusionson surface quality deep cold-drawn battery cups for electrical cars. obtained results revealed that, prevent defects sand-holes in cold-drawing process, attentions should be paid steelmaking and casting process optimal control inclusions. Because were often caused by large Al2O3 clusters CaO-Al2O3 particles. Most important, ...

SUS304 stainless steel surface asperities have a strong affinity to tool surfaces. Therefore, the flow of material in flange portion during deep drawing process is retarded due adhesive wear, leading increase amount wall thicknening along cup edge and rising risk for delayed cracks. In this paper, TiN coating applied die weaken affinity. Under elevated blank holding forces (BHF), experimental r...

Hydro-mechanical deep drawing is a process for producing cup shaped parts with the assistance of a pressurized fluid. In the present work, numerical simulation of the conventional and counter pressure deep drawing processes has been done with the help of a finite element method based software. Simulation results were analyzed to study the improvement in drawability by using hydro-mechanical pro...

This paper investigates the earing phenomenon in deep drawing of AA3105 aluminum alloy, experimentally and numerically. Earing defect is mainly attributed to the plastic anisotropy of sheet metal. In order to control such defect, predicting the evolution of ears in sheet metal forming analyses becomes indispensable. In this regard, the present study implements the advanced yield criterion BBC20...

Warm deep drawing of polypropylene, a semi-crystalline thermoplastic polymer, is studied using finite element analysis. In this process, circular polypropylene blank preheated to temperature much below its melting and drawn into the shape flat-bottom cylindrical cup punch-die combination, both initially at 25°C. The material model used for analysis considers effects varying strain rate during p...

Deep drawing is an important process used for producing cups from sheet metal in large quantities. The process parameters and viscosity of fluid is maintained the major role in the hydro forming-deep drawing process. Hydraulic pressure can enhance the capabilities of the basic deep drawing process for making metal cups. Hydraulic pressure contributes positively in several ways to the deep drawi...

Abstract In the present work, austenitic stainless steel (ASS) 304 foils with a thickness of 50 µm were first annealed at temperatures ranging from 700 to 1100 ? for 1 h obtain different microstructural characteristics. Then effects characteristics on formability ASS and quality drawn cups using micro deep drawing (MDD) studied, mechanism involved was discussed. The results show that as-receive...

We extend our earlier work on deep-structured conditional random field (DCRF) and develop deep-structured hidden conditional random field (DHCRF). We investigate the use of this new sequential deep-learning model for phonetic recognition. DHCRF is a hierarchical model in which the final layer is a hidden conditional random field (HCRF) and the intermediate layers are zero-th-order conditional r...

Up to now a large number of models have been developed to measure or predict the damage in equipments. Some of these models have been implemented in ABAQUS software. To implement damage parameters in the software, it is necessary to perform complex and expensive practical tests. One of these damage models is Forming Limit Diagram (FLD).The purpose of this research is deriving required parameter...