Download or read book Applicability of Cold Metal Transfer for Repair of Dissimilar Metal Welds in Stainless Steel Piping in Nuclear Power Plants written by Thomas Walker Daniels and published by . This book was released on 2015 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion resistant butt welds in nuclear coolant loop piping were made with the Ni-base alloy 600 family during their initial construction several decades ago. Time has proved this material selection to be inadequate for resisting stress corrosion cracking from the corrosive primary water solution. Continuing damage from primary water stress corrosion cracking (PWSCC) requires welds to be repaired using structural weld overlays (SWOLs) on the outer pipe diameter to prevent through-thickness breaches. In recent years the nuclear power industry has faced challenges with hot cracking when depositing SWOLs using gas-tungsten arc welding (GTAW). The solidification cracking has been linked to high dilution of the high-Cr Ni-base filler metal from the cast stainless steel base metal pipe. This study investigates the low heat input process called cold metal transfer (CMT) as an alternative to GTAW, and its ability to create low-dilution dissimilar metal SWOLs of filler metal 52M on 304L stainless steel. Bead on plate welds were made to simulate SWOLs on nuclear piping. Experimental procedures included a design of experiment (DOE) to optimize CMT overlay parameters, ThermoCalc[trademark] solidification simulations of diluted 52M with 304L stainless steel, compositional quantification of weld transition regions, and ultrasonic evaluation and mechanical testing of a CMT weld overlay mockup. DOE was used to acquire understanding of the CMT process and optimize bead-on-plate overlay parameters with respect to desired weld characteristics, which included low dilution, good surface quality, moderate toe angle, and defect-free welds. DOE was effective in developing predictive empirical models that were then used to target desired weld dilution, surface quality, geometry, and arc power responses. The resulting optimized CMT weld showed responses that fell within, or near ranges for acceptable criteria predicted by empirical equations.
Download or read book Advances in Computational Methods in Manufacturing written by R. Ganesh Narayanan and published by Springer Nature. This book was released on 2019-10-17 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a selection of papers from the 2nd International Conference on Computational Methods in Manufacturing (ICCMM 2019). The papers cover the recent advances in computational methods for simulating various manufacturing processes like machining, laser welding, laser bending, strip rolling, surface characterization and measurement. Articles in this volume discuss both the development of new methods and the application and efficacy of existing computational methods in manufacturing sector. This volume will be of interest to researchers in both industry and academia working on computational methods in manufacturing.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1989 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 1628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Cold Metal Transfer Welding on Properties of Ferritic Stainless Steel written by Stephen Magowan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Aged Piping Dissimilar Metal Weld Integrity ADIMEW written by and published by . This book was released on 2008 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the three-year ADIMEW project, which started in November 2000, was to contribute to the development and verification of analysis methods that describe the behaviour of cracked dissimilar metal welds (DMW). The complexity of the problem results from the prevailing mixed-mode loading conditions, the variation in material constitutive equations across the weld zone, and the presence of large residual stress fields. Under these circumstances, classic fracture mechanics concepts are difficult to apply. The project had the following technological and scientific aims:- Quantify the accuracy and conservatism of structural integrity procedures used by the nuclear industry in Europe to predict the behaviour and assess the safety of circumferential defects at the surface of dissimilar metal welds, - Perform a unique verification of the load-carrying capacity of an industrially representative cracked DMW under operating conditions in a large-scale structural test. To do this, a special assembly was prepared, with circumferential cracks introduced into the surface of a dissimilar metal weld between low-alloy steel and austenitic steel pipes with a diameter of 450 mm, - Rapidly disseminate the results for the benefit of operators, regulators and research organisations in Europe, in collaboration with the Network for Evaluating Structural Components (NESC). In order to reach these objectives, a large-scale nuclear DMW was tested and the different analytical methods available checked against the experimental results. Complementary innovative actions have been done on mixed-mode rupture, comparison of notch and crack toughness values. The ADIMEW project had an organisation similar to the one of the BIMET project with complementary objectives: larger diameter and higher temperature. The ADIMEW project followed on from the successful Fourth Framework Programme (FP4) BIMET project which had complementary objectives but considered smaller-diameter weld mock-ups tested at ambient rather than service temperature. The main focus of ADIMEW project was the performance of a single benchmark 4-point bend-pipe test, conducted on a nominal 16" piping assembly at 300 °C and containing a ferritic to stainless steel (A508-308/309SS-316SS) DMW. A notch-like defect was inserted at the ferritic steel/buttering layer interface, to simulate plant experience of damage at the worst-case location for a crack in such components. A second DMW mock-up was also manufactured for the experimental determination of welding residual stresses and for the generation of material property data for input to the analysis procedures. A range of analysis methodologies, including conventional flaw assessment methods, J approaches and local-approach methods have been applied to predict the critical load for initiation of the defect, the extent of crack growth, and the path followed by the crack through the weld up to the maximum load. Consideration has also been given to factors such as welding residual stresses, mixed-mode loading and constraint effects. The ADIMEW test was successfully executed in July 2003. The complete results of investigations of the test pieces were available in October 2003 and the post-test analysis was completed by December 2003.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1971 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1977 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Weld Integrity and Performance written by Steve Lampman and published by ASM International. This book was released on 1997-01-01 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key articles from over 10 separate ASM publications are brought together as a practical reference on weld integrity crack prevention. This book thoroughly covers the essentials of weld solidification and cracking, weldability and material selection, process control and heat treatment, failure analysis, and fatigue and fracture mechanics weldments. Contents also include an appendix for quick reference of tabular data on weldability of alloys, process selection, recommended interpass and heat treatment temperatures, and qualification codes and standards.
Download or read book The Journal of the Iron and Steel Institute written by Iron and Steel Institute and published by . This book was released on 1965 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the institute's Proceedings.
Download or read book High Performance Stainless Steels written by Curtis W. Kovach and published by . This book was released on 2000 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions written by Iron and Steel Institute and published by . This book was released on 1960 with total page 1812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Abstracts written by and published by . This book was released on 1978 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
