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Showing 1 to 20 of 20 for “"304L"”.
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Joining aluminum alloy 5083 to type 304L stainless steel using non-welding processes
Includes bibliographical references (pages 114-118).
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The influence of martensitic transformation on the formability of 304L stainless steel sheet
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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An Analysis of Microstructure and Corrosion Resistance in Underwater Friction Stir Welded 304L Stainless Steel
… for underwater friction stir welding (UWFSW) 304L stainless steel with a PCBN tool. UWFSW produced statistically significant: increases in yield strengths, decreases in percent elongation. The ultimate tensile strength was found to be significantly higher at certain parameters. Although sigma …
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Characterization and recyclability of 304L stainless steel powder for use in the selective laser melting process
… of ejecta on powder recyclability, samples of 304L laser spatter and condensate were characterized in terms of morphology, chemistry, and microstructure. Differences between ejecta and virgin powder were used as a basis for understanding the evolution in 304L powder properties with reuse in the …
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Effects of Friction Stir Processing on the Microstructure and Mechanical Properties of Fusion Welded 304L Stainless Steel
… to locally process regions of arc weldments in 304L stainless steel to improve the microstructure and mechanical performance. The cast microstructure and coarse delta-ferrite has been replaced with a fine-grained wrought microstructure. Furthermore, twins were introduced throughout the friction …
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COMSOL finite-element analysis : residual stress measurement of representative 304L/308L weld in spent fuel storage containers
… packages such as COMSOL. Using a representative 304L/308L weld plate as a model in COMSOL, predicted residual stress shows some agreement with expected trends: high tensile stresses in the weld/ HAZ regions and compressive stresses in the surrounding material. Hardness tests show trends similar …
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The effects of nitrogen concentration between 0.27 per cent and 1.30 per cent on internal friction peaks in 304L stainless steel
… 1.30 percent on the internal friction peaks in 304L stainless steel. The amplitude of the internal friction peak associated with the stress-induced diffusion of interstitial nitrogen increased as a linear function of the nitrogen content. The activation energy of diffusion was found to decrease …
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The Effect of Lead on Dealloying and Stress Corrosion Cracking (SCC) of Ni-Cr-Fe Alloys in Boiling Caustic Environments
304L stainless steel (SS) samples were exposed to a highly caustic 50 wt.% NaOH environment at or near the boiling temperature (135-140 °C) in reducing conditions to study dealloying. Flat samples were used for electrochemical measurements, and SS 316L was used in some tests to evaluate the effect …
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Residual stress measurements and analysis by destructive and non-destructive techniques
… Alloys EP-823 and HT-9, and austenitic Type 304L stainless steel (SS). Measurements of residual stresses were performed by both destructive and nondestructive techniques including ring-core (RC), neutron diffraction (ND) and positron annihilation spectroscopy (PAS). The results obtained by …
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Metallurgical characterization and residual stress measurements of target structural materials
… methods. Materials tested were austenitic Type 304L SS and martensitic Alloys EP-823 and HT-9. Types of specimen tested include cold-worked (CW), three-point-bent and welded specimens consisting of similar and dissimilar materials. The CW specimens showed increased residual stresses with an …
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Assessing coupled mechanical behavior and environmental degradation at submicron scales
… size effects. Investigation of films grown on 304L stainless steel and commercially pure grade II Ti <em>via</em> nanosecond pulsed laser irradiation has enabled isolation of film fracture behavior and the effect of processing on mechanical and electromechanical properties. Additionally, laser …
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Investigation of Chloride-induced Stress Corrosion Cracking for Long-Term Storage of Spent Nuclear Fuel in Dry Storage Systems
… a controlled fogging chamber to examine 304 and 304L stainless steel U-bend and welded U-bend samples. The samples were exposed to chloride rich and humid fogging in a corrosion chamber at 35℃ continuously for 4 weeks, 8 weeks, and 12 weeks. The same experiment was repeated at 50℃ for 4 weeks, 8 …
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Two Dimensional Friction Stir Welding Model with Experimental Validation
… during Friction Stir Processing (FSP) of 304L Stainless Steel was developed. The focus of the method was to ensure that the obtained temperatures were both accurate and repeatable. The method was then used to obtain thermal cycle data from nine welds, each at different operating conditions …
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Impact fracture of embrittled stainless steels
… and hydrogen-charged specimens of Types 304L and 316L austenitic stainless steels show significant hydrogen effects on the impact behavior of both materials. The Type 316L specimens showed greater hydrogen effects and a more pronounced"ductile-to-brittle transition." Analysis of new and …
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Hydrogen embrittlement: an interfacial phenomenon
… In impact and slow bend tests of 21-6-9 and 304L stainless steels, the effect of hydrogen manifests itself in hydrogen induced faceted fracture along interfaces in the metal lattice. The extent of this weakening increases as the hydrogen content in the test sample is increased and during slow …
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Laser welding of metallic glass to crystalline metal in laser-foil-printing additive manufacturing
… including pure Zr metal, Ti-6Al-4V alloy, and 304L stainless steel. The dissimilar bonding between the metallic glass part and the crystalline metal substrate is studied and then improved through the use of appropriate intermediate layers. The microstructure and properties of the fabricated …
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Measurement of optical properties of molten salts and metallic compounds for advanced solar and nuclear systems
… presence of the molten salt. The reflectivity of 304L stainless steel was measured for the wavelength range 600-5000 nm at incident angles of light 10°, 40°, and 70° after an 8-day molten salt immersion test. The reflectivity was measured to be less than 10% for the solar spectrum.
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The influence of copper addition on the corrosion behaviour of low nickel austenitic stainless steels
… Comparisons with the standard AISI 301 and 304L alloys showed that the copper-containing novel alloys showed superior corrosion resistance. The corrosion characterisation conducted in this thesis of these novel copper-containing alloys, proves that these alloys look promising as substitutes …
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Avaliação comparativa de dutos não metálicos RTP e dutos metálicos via análise de elementos finitos e de sensibilidade
… capa externa dos tubos RTP, e os materiais AISI 304L e o SAE 1020 serão utilizados para os tubos metálicos. Para cada uma delas, serão simulados esforços de tração, flexão e pressão para cada tipo de material, e, por fim, será observado graficamente como cada um deles vai responder a diferentes …
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High Cycle Fatigue Simulation using Extended Space-Time Finite Element Method Coupled with Continuum Damage Mechanics
… methodology on a notched specimen of AISI 304L steel to predict total fatigue life under different conditions. More than 1 million loading cycles are successfully simulated to accurately predict the irreversible fatigue damage growth in the specimen. Fatigue life results are verified by …