The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Tom Gray - One of the best experts on this subject based on the ideXlab platform.
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Investigation of temperature transients during flux-cored CO2 butt welding of CMn Steel plates
2003Co-Authors: Duncan Camilleri, Tugrul Comlekci, C.k. Lee, H.c.p. Tan, Tom GrayAbstract:Multiply-stiffened, thin plate, welded fabrications are used in a wide variety of transport fields, however the resulting out-of-plane distortion associated with welding exacts a severe design penalty. Depending on the information required, the size of the structure under investigation and the computer power at hand, three computational strategies may be considered to predict welding distortion. If prediction of the localized residual stresses from welding is of major importance, then a full transient, uncoupled thermo-elastoplastic analysis is preferred.
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Out-of-plane distortion of CMn Steel plates during flux-cored CO2 automatic butt welding
2003Co-Authors: Duncan Camilleri, Tugrul Comlekci, C.k. Lee, Tom GrayAbstract:Paper examining out-of-plane distortion of CMn Steel plates during flux-cored CO2 automatic butt welding.
Fawzy H. Samuel - One of the best experts on this subject based on the ideXlab platform.
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Recrystallization behaviour of a CMn Steel, a titanium-interstitial-free Steel and a niobium-microalloyed Steel during strip rolling
Materials Science and Engineering: A, 1991Co-Authors: Fawzy H. SamuelAbstract:Abstract In order to characterize the Lake Erie strip mill of Stelco, Canada, three grades of Steel (CMn, interstitial free (IF) and niobium microalloyed) were subjected to torsional simulation. The flow stresses and microstructural behaviours have been compared. As anticipated, for long interpass times (typical of plate-rolling schedules) the temperature T nr of no recrystallization can be clearly established only for the niobium Steel, the other grades undergoing nearly full recrystallization at all temperatures. Short interpass times, typical of strip-rolling schedules, lead to little pass-to-pass strain accumulation in the three Steels. In the temperature range 1000-900 °C, static recrystallization is largely responsible for the high degree of interpass softening in the CMn Steel. In the case of the IF Steel, during the latter stages of finishing, there is some strain accumulation, and both static and dynamic recrystallization occur to a significant degree. For the niobium Steel, because of solute effects, the short interpass times (about 1 s) do not permit much static recrystallization. Instead, softening is brought about mostly by dynamic and post-dynamic recrystallization. This is possible because there is considerably less Nb(C, N) precipitation during the short interpass times than under reversing (plate) mill conditions. The decreased level of precipitation in the niobium Steel followed by the initiation of dynamic recrystallization would lead to lower rolling loads in the strip mill for this grade than in the plate mill at the same temperature.
Leonardo Bertini - One of the best experts on this subject based on the ideXlab platform.
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Influence of seawater and residual stresses on fatigue crack growth in CMn Steel weld joints
Theoretical and Applied Fracture Mechanics, 1991Co-Authors: Leonardo BertiniAbstract:Abstract Results are presented on fatigue crack growth of weld joints made of CMn structural Steel plates in both air and seawater. Tests were conducted to identify the behavior at different locations of the joints as the frequency, R- ratio and electrochemical potential are varied. Residual stresses in specimens with welds are evaluated to analyse the fatigue crack growth behavior. Satisfactory predictions are obtained by accounting for residual stresses and crack closure.
Duncan Camilleri - One of the best experts on this subject based on the ideXlab platform.
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Investigation of temperature transients during flux-cored CO2 butt welding of CMn Steel plates
2003Co-Authors: Duncan Camilleri, Tugrul Comlekci, C.k. Lee, H.c.p. Tan, Tom GrayAbstract:Multiply-stiffened, thin plate, welded fabrications are used in a wide variety of transport fields, however the resulting out-of-plane distortion associated with welding exacts a severe design penalty. Depending on the information required, the size of the structure under investigation and the computer power at hand, three computational strategies may be considered to predict welding distortion. If prediction of the localized residual stresses from welding is of major importance, then a full transient, uncoupled thermo-elastoplastic analysis is preferred.
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Out-of-plane distortion of CMn Steel plates during flux-cored CO2 automatic butt welding
2003Co-Authors: Duncan Camilleri, Tugrul Comlekci, C.k. Lee, Tom GrayAbstract:Paper examining out-of-plane distortion of CMn Steel plates during flux-cored CO2 automatic butt welding.
E. R. De Los Rios - One of the best experts on this subject based on the ideXlab platform.
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Transition from small to long fatigue crack in CMn Steel
Scripta Metallurgica et Materialia, 1994Co-Authors: K. Hussain, E. R. De Los RiosAbstract:Fracture mechanics is an effective mechanism for characterizing the fatigue crack propagation. Generally, fatigue crack growth rate (da/dN) is presented as a function of stress intensity range ([Delta]K). A conventional fatigue crack growth curve of da/dN versus [Delta]K can be divided into three regions, i.e. region 1 (near threshold), 2 (Paris) and 3 (fast) crack growth regions. Depending upon the region of crack growth, fatigue crack growth behavior can be sensitive to microstructure, environment and loading conditions. In the near threshold region, fatigue crack growth rates are very slow and the influencing of microstructure, environment and load ratio on the rates of crack propagation is very significant. In the Paris region, there is a linear relationship between log(da/dN) and log([Delta]K). In this region the crack growth properties are not so sensitive to microstructure and load ratio. In the fast crack propagation regime, the rate of crack growth is relatively sensitive to microstructure and load ratio. In the present study small fatigue crack behavior in the ferrite-bainite microstructure of C-Mn Steel is investigated. The fatigue crack growth threshold is calculated with respect to barrier to crack growth and transition from microstructure sensitive (small crack) to microstructure insensitive (long crack) crack growthmore » is estimated.« less