...Abstract The strain-induced accelerated corrosion has been reported for many alloys used in structural and functional applications. To understand the effect of cold-work on corrosion behavior of alloys, specimens of carbon steel A569, strained to different amounts by cold-rolling, were used...

... composite system being used^1,2. The purpose of this paper is to discuss a testing program to validate the effectiveness of a composite repair system when designed according to formulas using a strain based approach rather than a stress based approach. Simulated corrosion defects manufactured...

... Model, Solid Model, and FEA simulations. Experimental composite sleeve experiments were performed to determine the strain reduction efficiency of different composites. The traditional shell model was found to underestimate the strains in the repair, Solid model and FEA models had close correlation...

...Abstract Digital image correlation is an emergent strain-mapping methodology that allows full-field surface strain mapping by comparing the images of the same region before, during and after deformation. This technique has been used to explore fatigue crack growth rates and the development...

... Material Properties Circumferential Strain - ε_c 0.01 in/in Design circumferential Modulus - E_c 8.0 (55) Msi (GPa) Circumferential strength - σ_c 100,000 (690) psi (MPa) Substituting the above values into eq (4) , the thickness of the repair...

... are designed to reduce the strain in damaged areas of pipe to an allowable stress. Most composite repair systems have a modulus in the range of 2-12 Msi(14-83 GPa) which is about 15-2.5 times less than that of steel. The amount of reinforcement required to reduce the stresses in the steel substrate...

... such as temperature cycling amplitude, temperature cycling frequency, and distance from mix point is explored. Cracking data from field experience are then compared to the predictions of the strain based model. Finally, results from a stress based finite element analysis, which incorporates computational fluid...

... in the steel. Many years of industrial experience and laboratory tests have helped to define safe conditions for carbon manganese steels, including weldments, to hardnesses no greater than 22 HRc (parent) and 250 HV5 or HV10 (weldments). It has been suggested that plastically straining a material prior...

... structures ² . The cumulative cyclic strain that can be obtained depends on the maximum stress, the frequency, R-ratio and temperature. Parkins has obtained cyclic stress-strain data for a number of different steels with a range of yield strengths, observing cyclic softening of all six steels tested...

... a powerful decision making tool for plant operators. Steam Reformer Reformer Tubes Catalyst Tubes Spun Cast Tubes Alloy Tubes Cast Tubes HK-40 HK-45 HP-Mod HP-Modified HP-Microalloy Laser NDT NDE Creep Strain Tube Harvesting Eddy Current Ultrasonic Reformer Strapping Pi Gauge...

...(wire diameter was 2.0mm) Shield gas 100% Ar Back shield gas 100% Ar Welding current 70-180 A Welding voltage 8 -10 V Welding speed 27 - 131 mm/min. Heat input 0.8 – 1.5MJ/m Pre-heat temperature 28 degree C min. Interpass temperature below 71 degree C Strain and aging...