...Venkateswaran Perumal; Sivakumar Palanivelu; Siba Prasad Mookherjee; Ajit Kumar Jindal The present paper investigates the microstructure and mechanical properties’ aspects of AISI 4140 steel front axle beams developed by roll and hot-die forging processes. Microstructure of the processed beams...

... and rosette type microstructures, fine and globularized rheology material was obtained and the feasibility of the rheoforging process was found to be positive. In the case of the direct rheoforging process, excessive applied forging-pressure caused material spattering, which in turn caused eutectic...

.... It is then used to predict the variation in dwell fatigue lifetime for critical microstructural conditions. The studies are extended to field experiments on β forged Ti-6242. Macroscopic aspects of loading are explored for their effect on dwell fatigue life of Ti-6242. 31 12 2007 02 11 2008 06 03...

... module is used to determined the rheological parameters. 17 01 2007 18 08 2008 15 12 2008 compressive strength compressive testing finite element analysis forging forming processes friction optimisation rheology steel friction compression rheological behavior...

... of a workpiece during a multistage hot forging process of a bearing race. A rigid-thermoviscoplastic finite element method is applied. The experimental and numerical results are summarized to reveal the reasons for internal crack formation. High carbon chromium steel (STB2) and a surface hardened steel...

...Gerald T. Cashman A methodology is presented for the preparation of a competing modes fatigue design curve. Examples using extruded and isothermally forged powder metallurgy René 95 are presented. Monte Carlo simulation results are given to identify sample size requirements appropriate...

... the entire specimen thickness are investigated. They are truncated Legendre series, regularized Legendre series, and regularized unit pulses. In tests with simulated strain data and with strain data measured on a cold compressed 7050-T7452 Aluminum hand forging, the three methods gave generally similar...

...R. Narayanasamy; V. Senthilkumar; K. S. Pandey Experiments were carried out to evaluate the hot forging features in the high-strength sintered Powder Metallurgy TiC composite steel performs under different stress states, namely, plane and triaxial stress. Cylindrical compacts with aspect ratios...

...Siamak Serajzadeh In the present study, a mathematical model has been developed to evaluate temperature and strain fields as well as dynamic and static microstructural changes during the nonisothermal forging process. To do so, a finite element analysis and a microstructural model based...

...M. S. Bruzzi; P. E. McHugh A defect tolerant approach to fatigue modeling for constant amplitude loading was developed by Bruzzi and McHugh (2002) and applied to two metal matrix composites: (1) a forged 2124 Al reinforced with 17 percent SiC particles and (2) a cast 359 Al reinforced with 20...

... bending finite element analysis friction fracture forging metals forming processes stress-strain relations tensile strength crystal microstructure Sheet metal forming is a major fabrication process in many sectors of industry. Throughout the years, technological advances have allowed...

...T. J. Nye, Assistant Professor; A. M. Elbadan, Graduate Student; G. M. Bone, Associate Professor Open die forging is a process in which products are made through repeated, incremental plastic deformations of a workpiece. Typically, the workpiece is held by a manipulator, which can position...

... April 1999 14 October 1999 fatigue cracks ductile fracture brittle fracture carbon steel forging In the fatigue crack propagation corresponding to the Paris regime, together with the conventional fatigue mechanisms, other processes of static nature can take place in some...