Papers by Keyword: Stainless Steel (SS)

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Authors: Julia Repper, Markus Niffenegger, Steven van Petegem, Werner Wagner, Helena van Swygenhoven
Abstract: Complex strain paths are often applied to materials during production processes. This paper shows the first successful in-situ biaxial mechanical tests during neutron diffraction performed on a cruciform steel sample and reports on the differences compared to uniaxial deformation. Digital image correlation is demonstrated to be an appropriate tool to monitor spatially resolved the macroscopic straining. The new, modular biaxial machine that will be installed at the neutron diffractometer POLDI is presented.
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Authors: Da Zhi Zhang, Zheng Yi Jiang
Abstract: A three-dimensional dynamic simulation model of the molten iron flow field was presented in the paper with Fluent simulation software. Different operating parameters combinations, including different oxygen lance locations, oxygen pressures and oxygen flows, different arrangements of bottom blowing holes, hole sizes, nitrogen pressures and nitrogen flows were studied. It is shown that the relative optimum value of the distance from top-blow gun to the molten iron surface is 1500 mm, and bottom blowing hole diameter is 20mm, there is no significant difference of the blowing effects found when comparing single ring arrangement with double rings arrangement of 8 bottom blowing holes with only bottom-blow, and the bottom-blow of inner ring is disturbed by top-blow when top and bottom combined blow. Optimized design results have been applied to the design and manufacture of the actual converter, the converter has been successfully used in plant. The actual production results indicate that the desiliconization precision can reach 0.05%, the content of Cr2O3 in the slag after reduction can be less than 2%, better than the technical requirements of 3%, and improve the recovery rate of the chromium. Compared with traditional desiliconization method by iron gutter and iron ladle, desiliconization by converter does not use compression residue agents and reduce the amount of desiliconization agents and slag, and improve the desiliconization efficiency and productivity.
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Authors: Catherine Gardin, Saverio Fiordalisi, Christine Sarrazin-Baudoux, Jean Petit
Abstract: The plasticity-induced crack closure of through-thickness cracks, artificially obtained from short cracks grown in CT specimens of 304L austenitic stainless steel, is numerically simulated using finite elements. Crack advance is incremented step by step, by applying constant ΔK amplitude so as to limit the loading history influence to that of crack length and crack wake. The calculation of the effective stress intensity factor range, ΔKeff, along curved shaped crack fronts simulating real crack fronts, are compared to calculation previously performed for through-thickness straight cracks. The results for the curved crack fronts support that the front curvature is associated to constant ΔKeff amplitude, thus assumed to be the propagation driving force of the crack all along its front.
295
Authors: Yoshinori Hirata, Yasuhiro Asai, Kazuhiro Takenaka, Shinji Ohgaki, Fumikazu Miyasaka, Takayoshi Ohji
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Authors: Frédéric Riffard, Henri Buscail, Eric Caudron, Régis Cueff, Christophe Issartel, S. El Messki, Sébastien Perrier
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Authors: Tae Soo Kim, Min Seong Kim, Seung Hun Kim, Yong Taeg Lee
Abstract: Stainless steel has been utilized on structural members of building due to significant characteristics in its superior corrosion resistance, durability, aesthetic appeal etc. Recently, structural behaviors and curling effect in single shear bolted connection fabricated with thin-walled plane plates have been studied by T.S. Kim. In this paper, finite element analysis (FEA) has been conducted based on the existing test result of channel bolted connections in austenitic stainless steel. The validation of numerical approach was verified to predict the structural behaviors such as fracture mode, ultimate strength and curling occurrence of bolted connections. Curling (out-of- plane deformation) also occurred in the connections with a long end distance like bolted connections assembled with plane plates. The curling caused the ultimate strength reduction and ultimate strength reduction caused by curling has been estimated quantitatively through the comparison of FEA results of FE models with free edge and restrained curling. Additional parametric analysis for FE models with extended variables has been performed. Therefore, the ultimate strengths were compared with current design strengths and reasonable strength formulae for connections with no curling effect were proposed.
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Authors: Yoshiyuki Masuta, Koichi Okuda, Hiroo Shizuka, Masayuki Nunobiki
Abstract: This paper describes an influence of the cutting condition on the tool performance and the hole shape accuracy in a deep-hole machining of stainless steel with small-diameter drill. The drilling tests were carried out by changing the feed, tool diameter and drill length in order to investigate the appropriate cutting conditions for drilling the holes with deep depth. The results indicate that the increase of the thrust force leads to the buckling of the drill and the work hardening of the workpiece causes the tool failure.
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