The present study investigates the effect of shot peening (SP) on the mechanical properties and surface roughness of 7075 aluminum alloy during different stages and conditions of heat treatment. The mechanical properties were determined by measuring Vickers microhardness profiles and residual stress profiles, while the amount of alloying elements p...
Published in Russian Metallurgy (Metally)
AbstractThe influence of the fraction of the powdered waxy material to be compacted and the holding time under load on the residual stresses and the elastic response of the compacts is studied. The elastic response is experimentally found to be minimal in the compacts with a porosity of 7–12% at residual stresses less than 0.02 MPa in the compacted...
Published in Materials Testing
When the hole-drilling method is used to measure residual stress, plasticity effects occur if the residual stress exceeds 60 % of the yield stress. Plasticity effects result in an overestimation of the residual stress as the hole-drilling method is based on the linear elastic behavior of materials. To overcome this problem, a simplified iterative m...
Published in Journal of Machinery Manufacture and Reliability
AbstractIn this paper, the literature data on the results of theoretical and experimental studies aimed at the development of the scientific foundations of evaluation of residual stresses in ferromagnetic materials according to the measurements of their magnetic parameters are analyzed. The data that indicate the reasonability of multiparameter con...
Published in Journal of Machinery Manufacture and Reliability
AbstractThe problem of residual stresses that arise during the curing of products of polymer composite materials and cause warping (warpage) is considered. A calculation model is proposed that allows for the prediction of residual strains and design of predictive molding tools. The approach developed ensures a high accuracy of manufacturing article...
Published in Steel in Translation
AbstractThe surface topography’s subsurface layer condition and the wear elements of balls operated in the mills using wet and dry grinding are studied. The factors that determine the tendency for products to increase its level of wear and cracking during operation have been revealed. Measures have been developed, and its implementation made it pos...
Published in Materials
This paper presents a uniquely designed device combining the hole-drilling technique with two optical systems based on the PhotoStress and digital image correlation (DIC) method, where the digital image correlation system moves with the cutting tool. The authors aimed to verify whether the accuracy of the drilled hole according to ASTM E837-13a sta...
Published in Steel in Translation
AbstractMost technological processes of metal products manufactured by plastic deformation methods are associated with the formation of a self-balanced system of residual stresses in finished products. In many cases, the level of residual stresses is an important parameter that determines the product quality obtained as a result of plastic deformat...
Residual stresses were studied in tungsten heavy alloy bars produced by powder metallurgy and deformed by rotary swaging at room temperature (RT) and at 900 degrees C. Neutron diffraction technique was used to scan the residual stresses across the bars. Both tungsten particles and NiCo2W solid solution matrix were analysed. Maximum axial stresses o...
Published in Inorganic Materials: Applied Research
AbstractThe microstructure and distribution of residual stresses in the AMg6 alloy after laser shock treatment in the power density range of 1.3–6 GW/cm2 have been studied. Using X-ray structural analysis, it has been found that, after laser exposure, the size of the coherent scattering regions (CSR) decreases to 60 nm, the value of microstrains in...
