... applied to the surface of the material. Compared to other surface strengthening methods, LSP has a high strain rate. LSP process can increase the surface hardness of the material, introduce compressive residual stress and improves the mechanical properties of the material. However, the conventional LSP...

... from the thermal history of the printed parts. The relatively smaller heat source (laser) following a given scan pattern results in rapid solidification and uneven distribution of thermal energy, which in turn develops residual stresses in the printed parts. Through island-type scanning, the rapid...

... deposition. This physics-based model captures the influences of significant material flow, adiabatic heating due to plastic deformation and frictional heating during deposition and reasonably predicts temperature and residual stress. additive friction stir deposition aluminum alloy residual stress...

... to finish a high-quality surface of part. Adhesion of material deteriorates the surface finish especially in cutting of Al-Li alloy. Residual stress should also be controlled in manufacturing of parts applied to aircrafts. The cutting parameters and the tool, therefore, should be determined considering...

... properties, fatigue life has received much more attention because of its importance in load-bearing applications. On the other hand, decisive factors like residual stress and defect structure hinder the applicability of AM components from being used in mission-critical load-bearing applications. This paper...

...). To this end, the residual stresses and distortions are numerically computed considering different ranges of extrusion temperatures, printing speeds, and layer heights. Then, resulting elastic properties are predicted using the Asymptotic Homogenization technique. For that, two unit cells representing...

... Abstract Understanding the relationships between the processing factors in laser powder bed fusion (L-PBF) and residual stress formation is critical for improving the final part performance since tensile residual stress has a critical impact on fatigue life performance and final material...

... Abstract White layer and residual stress are the main reasons for the decrease in fatigue life of electrical discharge machined samples. Therefore, it is important to research the evolution of the white layer and residual stress in electrical discharge machining and explain the influence...

... Abstract Residual stress build-up in metal additive manufacturing (AM) is a well-known problem that can impede the applicability of the AM parts. Residual stress may cause the part to fail due to the crack or fall out of the specified dimension. Thus, in order for a part to be used in a mission...

... Engineering, Fujian Polytechnic of Information Technology, Fuzhou, Fujian, China Bingbing Li* Department of Manufacturing Systems Engineering and Management, California State University, Northridge, CA, USA KEYWORDS Laser cladding, Preheat temperature, Residual stress, Microstructure, Micro-hardness ABSTRACT...

... of Ti6Al4V alloy fabricated by direct laser deposition (DLD). After laser peening, little difference of surface roughness is observed. Compressive residual stresses are induced on the top surface layer. The maximum value of compressive residual stress is about −520 MPa and the compressive state extends...

... involves the impact of multiple particles on the substrate surface depositing layer-by-layer. This research focuses on investigating the residual stresses distribution caused by the impact of multiple nanoparticles on the substrate surface during the CS process using MD simulation technique. The results...

... Abstract This study investigates the effects of laser shock peening (LSP) on residual stress, near surface modification, and hardness of Inconel 718 (IN718) specimens manufactured by selective laser melting (SLM) technique. Optical microscope and electron backscattered diffraction (EBSD...

... forces and residual stresses. This method is extraordinarily efficient saving more than 33% simulation time in comparison to existing FEA approach used for machining processes. Moreover, the script is concise, easy to debug, and effectively avoiding interactive mistakes. The rapid programming model...

... (MWCNT) nanofluid instead of soluble oil. The MWCNT nanofluid was found to be superior to alumina nanofluid in reduction of tensile residual stress. Such a reduction is typically an indirect indication of reduction of cutting zone temperature, which could be achieved due to enhanced level of lubricity...

.... The results during oil quench process have shown that a section size ratio of 1:2 creates the highest stress concentration and cracking possibility. Quench Hardening Phase Transformation Cracking Modeling Residual Stress Distortion 1 Copyright © 2013 by ASME PHASE TRANSFORMATION AFFECTED QUENCH...

... 19 09 2011 To evaluate the residual stress distribution along cutting direction in hard turning process, an explicit dynamic thermo-mechanical orthogonal Finite Element Model (FEM) is developed to consider the correlation between residual stress distribution and chip morphology...

... distribution and temperature distribution in machined surface, and especially the residual stress in machined surface. It identifies hard cutting under pretension-stress condition is an effective approach to generate a beneficial compressive residual stress profile in hard turning characterized by a bigger...

... 27 07 2009 Hard turning and grinding are competitive processes in many cases for manufacturing various mechanical products. Product performance is highly dependent on the process induced residual stresses. However, there exist some inconsistence regarding the true residual stress...

... 27 07 2009 The characteristics of residual stress (RS) profiles and their effects on rolling contact fatigue life for precision turned and ground surfaces with a white layer (WL) are very controversial. The key findings of this study are: (a) The basic RS profiles by a sharp tool can...