...T. Roy; A. Sharma; P. Ranjan; R. Balasubramaniam Electrical discharge machined surfaces inherently possess recast layer on the surface with heat affected zone (HAZ) beneath it and these have a detrimental effect on the mechanical properties viz., hardness, elastic modulus, etc. It is very difficult...

...-hardened stainless steels. In the present study, effect of different heat treatment processes, namely solution annealing, aging, and overaging, on tensile strength, hardness, and wear properties has been studied in detail. Suitable metallurgical and mechanical characterization techniques have been applied...

... drills when compared with untreated drills. These improvements were mainly attributed to formation of fine and homogeneous carbide particles and transformation of retained austenite to martensite. Microhardness and microstructure observations verified these formations. microstructure hardness...

... temperatures under 1 MPa dynamic pressure of contact. The influence of different bonding temperatures on the microstructure, microindentation hardness, joint strength, and interlayer thickness has been studied. Additionally, a simple numerical model was developed to predict the evolution of interlayer during...

... of ceramics. The LWJ process also improved the surface finish while reducing energy losses in the process. The practical realization of the LWJ manufacturing process could be a potential alternative to diamond saw, high-power laser, and high-pressure abrasive water-jet methods for machining hard and brittle...

... diagram. The ferritic and martensitic transformation as well as austenitization and tempering of martensite are considered. The influence of processing parameters such as laser power and traverse speed on the phase transformation and the consequent hardness are analyzed. The potential presence of porosity...

...K. Fathima; M. Rahman; A. Senthil Kumar; H. S. Lim The electrolytic in-process dressing (ELID) grinding is a new and an efficient process for ultra-precision finishing of hard and brittle materials. Unlike conventional grinding processes, the ELID grinding is a hybrid process that consists...

...Jing Shi; C. Richard Liu The need for predicting material microstructure and hardness in hard turned surfaces becomes very urgent in that hard turning is adopted by industries as a finishing process, and the produced surface integrity, including microstructure and hardness, is well known...

... are reviewed. Using an instrumented drilling-based test-bed, the effects of lubricating component depletion, microfiltration, and dilutant water hardness were assessed. It was observed that microfiltration had no effect on fluid functionality. Increases in dilutant water hardness were found to produce...

... of microstructure and hardness of the fabricated Ni-nanoparticles dispersed H13 steel gear-shaped molds. Koch, C. C., 2002, Nanostructured Materials: Processing, Properties, and Potential Applications , Noyes Publications, New York. Goldstein, A. N., 1997, Handbook of Nanophase Materials , Marcel Dekker...

...Jing Shi; C. Richard Liu Hard turning involves the mechanical deformation of materials, coupled with the heat generation from friction and dissipation of deformation energy. The mechanical and thermal effects on microstructure and hardness of hard turned surfaces are decomposed by a proposed method...

... characterization of shock treated copper thin films on single-crystal silicon substrates, where scanning x-ray microtopography is used to map the relative variation of the stress/strain field with micron spatial resolution, and instrumented nanoindentation is applied to measure the distribution of hardness...

... of workpiece hardness and cutting speed on chip formation, workpiece surface integrity and cutting forces. Equations are detailed for determining the primary shear zone temperature, the proportion of heat conducted into the workpiece and the shear flow stress. Following on from this, experimental work...

... towards the free surface. Depending on the work material hardness and cutting conditions, catastrophic failure within the upper region of the primary shear zone occurs through either ductile fracture or large strain plastic deformation. Prior to the onset of chip segmentation, which occurs with increases...

...Jeffrey D. Thiele; Shreyes N. Melkote; Roberta A. Peascoe; Thomas R. Watkins An experimental investigation was conducted to determine the effects of tool cutting-edge geometry (edge preparation) and workpiece hardness on surface residual stresses for finish hard turning of through-hardened AISI...

...T. I. El-Wardany, Research Associate; H. A. Kishawy, Ph.D. Candidate; M. A. Elbestawi, Professor, Fellow ASME The main objective of this paper is to investigate the quality and integrity of the surface produced during high speed hard machining (HSHM) of D 2 tool steel in its hardened state (60–62...

... based on the integrity of the surface produced. 2) Unlike case hardened steel, “saw toothed” chips will only be formed during hard turning of D 2 tool steel when the cutting pressure exerted in the direction of the cutting speed exceeds a value of approximately 4000 MPa. 3...

...Ge´rard Poulachon; Alphonse L. Moisan A 100Cr6 (AISI E52100) steel in the hardness range of 180 to 750 HV 10 was machined. Quick stop tests were carried out at various hardness values to observe the different chip formation mechanisms. A limit was found between the shearing and cracking chip...