Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Residual stress measurement"”.
-
A Novel Approach to Residual Stress Measurement
<p> Residual stress is a topic of ever increasing concern in many industries and aspects of engineering. Existing methodologies for quantifying residual stresses have been proven effective, all with their respective drawbacks. This thesis provides an authentication of a novel strain measurement and …
-
Mobile neutron sources for residual stress measurement
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
-
Residual stress measurement in railroad car wheels
… is based on the fluctuations of the azimuthal residual stress in the tread of the wheel. This criterion is based on a maximum likelihood statistical analysis of data obtained from six different wheels as deterrmined by x-ray diffraction. Of these locations, the analysis showed the tread, and …
-
Controlling plasticity in the contour method of residual stress measurement
… method has emerged as a promising technique for residual stress measurement in relatively large, thick and complex engineering components. The method involves making a cut in the sample of interest, measuring the subsequent relaxed deformation profile of the cut surface and using this profile to …
-
Development of Residual Stress Measurement for Concrete Pavements through Cantilevered Beam Testing
Knowledge of residual stresses is important in understanding and predicting a concrete pavement’s performance. However, there is not a standard test for residual stresses in pavements. Prior pavement research was inspired by the hole-drilling straingage method used in metals. This method involves …
-
Residual stress measurement and structural integrity evaluation of SLM Ti-6Al-4V
The constant drive toward cleaner, more powerful and more efficient jet turbines in the aerospace industry has narrowed the gap between the aircraft performance envelope requirements and the material limits. The most advanced turbine engines are incredibly complex in design and the weight-saving …
-
COMSOL finite-element analysis : residual stress measurement of representative 304L/308L weld in spent fuel storage containers
… time they will be viable for storing spent fuel. Stress corrosion cracking (SCC) is a concern in these canisters if they are exposed to an aqueous, chloride-containing film. Canisters are fabricated using a concrete overpacking, along with austenitic stainless steel on the inside which is welded …
-
Residual stress evaluation of aluminium drill rods
… of an air abrasive centre hole (AACH) residual stress measuring facility as well as its use in an experimental study of residual stresses developed in extruded high strength aluminium drill rods. These drill rods were manufactured by Hulett Aluminium for the mining industry for surface …
-
Interrelationships of microstructure, stress and diffusion
… magnetic properties. They can exhibit very high residual, internal stresses arising from the film growth and/or external effects. Apart from direct mechanical consequences, several processes such as grain growth and diffusion can be affected by these stresses and their gradients. As a result, it …
-
Influences of surface quality on the rolling contact fatique behaviour of ceramics
… surface analysis, including X-ray diffraction residual stress measurement. As a result, the relationship between the finishing process and surface quality has been established. Accelerated rolling contact fatigue tests were performed both under a standard 4-ball and a modified 5-ball rolling …
-
Characterization of thermally diffused bordie layers on AISI 1018 steel : residual stresses (by synchrotron radiation) and microhardness
… should be extensive. Measuring the residual stresses of the coatings caters to each of these aspects. In this study, AISI 1018 steel samples were boronized by a powder-pack process for four hours at 850 C in an argon atmosphere. Characterization techniques included coating thickness, …
-
Experimental Characterization and Finite Element Simulation of Laser Shock Peening Induced Surface Residual Stresses using Nanoindentation
… use of nanoindentation for measuring the surface residual stress induced by laser shock peening. While the technique has been studied by a number of groups, accurate measurement using nanoindentation is hindered by a good method of estimating the contact area, which is the basis of all the …
-
Surface degradation and creep of Inconel 617 and Haynes 230 at high temperatures
… near the surface area is in a form of Cr3C2. 5. Residual stress measurement showed the intrinsic residual stress of Cr2O3 are tensile during the growth of the oxide for both alloys. The development of intrinsic stress with increasing exposure time in low-pO2 gas is relatively stable than in air, …