... and with combined substrate preheating, interlayer dwell, as well as postheat treatment. The processed sample’s microstructural characteristics, residual stress, microhardness, and tensile properties are assessed in comparison to the manufacturing strategies. Rapid heat dissipation caused finer microstructure near...

... of compressive residual stresses is induced at LN 2 temperature, followed by at room temperature, but the stresses change to tensile in nature at the elevated temperature. The authors gratefully acknowledge the partial support provided for this work by National Center for Aerospace Innovation...

... of shot peening induced residual stress, in this paper, the focus is on peen forming as a result of repeated spherical impingement. Specifically, a 3D FE model with 1500 randomly distributed shots bombarding an Almen strip was developed. Strain rate dependent plasticity was considered and an artificial...

...K. Dalaei; C. Persson; B. Karlsson As a method for mechanical surface treatment, shot peening has been widely used to improve the fatigue strength of materials. However, the influence of residual stresses introduced by shot peening depends on their stability. The stability of residual stresses...

...Mahmood M. Shokrieh; Saeed Akbari R. This paper investigates the effect of shear stresses on the determination of residual stresses in isotropic and orthotropic materials by the slitting method. A great deal of research effort is focused on the estimation of the residual stress component normal...

...S. Nakhodchi; B. G. Thomas; D. J. Smith Residual stresses in a stainless steel vessel containing glass have been evaluated using measurements and numerical simulation. High-level nuclear wastes are often vitrified in glass cast in cylindrical stainless steel containers. Knowledge of the internal...

...A. Makino; D. V. Nelson; M. R. Hill The strain gauge rosette hole drilling method is often used for determining residual stresses versus depth to depths on the order of 0.5–1.5 mm. Frequently, it is of interest to find stress profiles to greater depths. To provide such a capability, a new approach...

...H. T. Lee; T. Y. Tai; C. Liu; F. C. Hsu; J. M. Hsu When measuring the residual stress within a component using the electrical discharge machining (EDM) strain-gage method, a metallurgical transformation layer is formed on the wall of the measurement hole. This transformation layer induces...

...You Sung Han; Kyehyung Lee; Myoung-Soo Han; Hyunchil Chang; Kanghyouk Choi; Seyoung Im Welding is one of the most important joining processes, and the effect of welding residual stresses in a structure has a great deal of influence on its quality. In spite of such a key interest, the analysis...

...Rajesh Prasannavenkatesan; David L. McDowell Using a three-dimensional crystal plasticity model for cyclic deformation of lath martensitic steel, a simplified scheme is adopted to simulate the effects of shot peening on inducing initial compressive residual stresses. The model is utilized...

... while material away from the hole undergoes elastic deformation. Upon removal of the mandrel, the ensuing elastic recovery of the surrounding material results in the development of a compressive residual stress field around the hole. Since the magnitude of plastic deformation sustained by the material...

...D. Vangi; S. Tellini When measuring residual stresses using the hole-drilling strain-gauge method, plasticity effects arise if the residual stress level exceeds about 60% of the material yield strength. In this case the classical methods, which are based on the linear elastic material behavior, do...

...Dennis J. Buchanan; Reji John; Robert A. Brockman Shot peening is a commonly used surface treatment process that imparts compressive residual stresses into the surface of metal components. Compressive residual stresses retard initiation and growth of fatigue cracks. During the component loading...

...Pierluigi Pagliaro; Michael B. Prime; Bjørn Clausen; Manuel L. Lovato; Bernardo Zuccarello In order to test new theories for residual stress measurement or to test the effects of residual stress on fatigue, fracture, and stress corrosion cracking, a known stress test specimen was designed...

... residual stresses on the entry surface rather than the middle and exit surfaces. Due to the nonuniform residual stress distribution, fatigue crack initiation often occurs on the entry surface. This study proposes a new approach to increase the compressive residual stress magnitude at the entry of the hole...

...A. Sahaya Grinspan; R. Gnanamoorthy A new surface modification process was developed to introduce compressive residual stresses at the surface of components. In this process, instead of oil droplets a high-velocity cavitation jet (cloud of oil bubbles) impinges on the surface of the component...

... is assigned a target surface area 2 C × 2 C thus allowing higher density of impact point locations. Average residual stresses inside the target predicted by FEA were compared with experimental measurements using the hole-drilling technique. In order to do this, a new averaged technique was developed to obtain...

...Matthew J. Lee; Michael R. Hill This paper investigates the effect of strain gage length on residual stress estimated by the slitting (or crack compliance) method. This effect is quantified for a range of gage length normalized by sample thickness, l ∕ t , between 0.005 and 0.100. For specific l...

...J. Yan; X. Chen; A. M. Karlsson An alternative, improved method to determine mechanical properties from indentation testing is presented. This method can determine the elastic modulus, yield strength and equi-biaxial residual stress from one simple test. Furthermore, the technique does not require...

... in-process control thermal elastic–plastic analysis numerical computation residual stress real-time measurement It is well known that evaluating welding distortion and residual stress is important in order to assure material weldability, structural fabricability, and structural integrity...