... on this recommended set of conditions, an experimental design spanning the corners of the feed-speed design space for the two cutting insert types with different grains sizes was tabulated as shown in Tables 1 and 2 . For a DoC = 1 mm, V  = 69 m/min, and f  = 0.13 mm/rev (C3 grade), For a DoC = 4 mm, V...

... densities and grain sizes in machined surface. The predicted results show that dislocation densities decrease with the depths below the machined surface, but grain sizes present an opposite tendency. Higher cutting speeds are associated with thinner plastic deformation layers. Dislocation densities decrease...

... on DC magnetic properties and microstructure of samples. The result shows that annealing process parameters have a nonlinear effect on the development of material microstructure and magnetic properties. Furthermore, the models among magnetic property, grain size, and process parameters have been built...

... , Oxford University Press , Oxford , pp. 317 – 324 . [16] Yamagushi , K. , and Mellor , P. B. , 1976 , “ Thickness and Grain Size Dependence of Limit Strains in Sheet Metal Stretching ,” Int. J. Mach. Sci. , 18 , pp. 85 – 90 . 10.1016/0020-7403(76)90055-2 The authors would like...

... correlation with feed rate, and the wavelength magnitude may be linked to the grain size of the workpiece material. The roughness of machined surfaces increased as the tool moved deeper due to reduced flushing efficiency. Surfaces on the machined rods were less sensitive to the input variables than the hole...

...C. J. Luis Pérez; R. Luri Severe plastic deformation processes have a great deal of importance because of the improvement in mechanical properties of the processed parts as a consequence of the grain size reduction in the material due to the accumulation of deformation. One of the main severe...

... and reduce required forces for deformation. While forming at elevated temperatures is common, the EAF process provides more significant improvements in formability without the undesirable effects associated with forming at elevated temperatures. This research investigates the effect of grain size and current...

..., as the changes in the deformation occur over short distances (in the order of micrometers). In addition, with miniaturization, the number of grains that are present through the thickness decreases significantly. In this research, the effect of grain size and specimen size on the deformation distribution through...

... in stainless steels. Theoretical critical twinning stress is not the only criteria to decide the deformation modes of twinning or slip. The formation of twinning and slip can be affected by the factors such as loading profile, loading stress/strain rate, stacking fault energy, grain sizes, and cell...

... function tanh ( T / D ) , which is a function of T / D (sheet thickness/grain size). The predicted flow stress agrees very well with the published experiment. Notably, a specimen with smaller grains has lower normalized flow stress for a given T / D . Since the material properties of the macroscale...

... to pure magnesium, the mechanical properties including tensile strength and yield strength of the Mg ∕ Si C nanocomposites were improved significantly, while the good ductility of pure Mg was retained. The grain size of the pure magnesium was refined significantly when SiC nanoparticles were dispersed...

... submillimeter sized pins. It was noted that pins fabricated from large grain-size material ( 211 μ m ) showed a tendency to curve, whereas those fabricated from billets having a small grain size ( 32 μ m ) , did not show this tendency. In order to further investigate these phenomena, it was necessary...

... tendency when a workpiece with a relatively coarse grain size of 211 μ m was used. This phenomenon was not observed when workpieces with a finer grain size of 32 μ m were used. In this paper, results from microhardness tests and microstructure analyses for both grain sizes are presented to investigate...

...R. Luri; C. J. Luis; J. León; M. A. Sebastian Equal channel angular extrusion or pressing (ECAE or ECAP) is a process used in order to impart severe plastic deformations to processed materials with the aim of improving their mechanical properties by reducing the grain size. The grain size reduction...

... range of conditions on hardened bearing steel with wheels containing different abrasive grain sizes. The radial wheel wear was characterized in each case by an initial transient at a progressively decreasing rate to a steady-state wear regime at a nearly constant rate until the end of the wheel life...

... with a loading substage to extrude micropins with a final diameter of 1 mm. The effect of grain size is investigated by using workpieces heat treated to produce grain sizes varying from 32 μm up to 211 μm. Two extrusion dies with different roughness are used to study the effect of surface finish. While...

...Yutaka Neishi, Research Engineer,; Masayoshi Akiyama, Research Fellow,; Kouichi Kuroda, Manager of Section, Laboratory experiments using a hot deformation simulator were carried out to clarify the effect of initial grain size on the grain coarsening phenomenon in hot metal working with light...