Download or read book Development of Dispersion Strengthened Nickel and Cobalt Base Alloys written by Richard F. Cheney and published by . This book was released on 1965 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods were compared for preparing dispersion-strengthened nickel- and cobalt-base alloys. A technique of selectively reducing intimately mixed oxides, which were prepared by atomizing and drying a solution of the components, was more successful than one involving the coating of dispersoid particles with the matrix by vapor deposition. The conditions were determined for preparing Ni-15Mo-4ThO2 and Co-15Mo-4ThO2 powders by selective reduction. Hot pressing, hydrogen sintering, and powder rolling were evaluated for powder consolidation. The conditions for successful rolling, extrusion, and forging were investigated for Ni-15Mo-4ThO2. Process temperatures above 1200C promoted ThO2 growth to 400-500A. Deformation-anneal sequences were critical to good strength at elevated temperatures. Ultimate strengths of 21 ksi at 1800F were obtained and higher strengths seem possible. Molybdenum considerably improved the matrix strength to at least 1400F.

Download or read book written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of Recent Developments in the Technology of Nickel base and Cobalt base Alloys written by D. A. Roberts and published by . This book was released on 1961 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments are summarized in the fiel of Ni-base and Co-base alloys and high-strength superalloys. Work of interest includes the dispersion hardening of Ni-base materials and a new approach to the development of high-temperature Ni-base alloy sheet. Also included is previous work on t e cracking of jet engine buckets which has recently been declassified. (Author).

Download or read book The Development of Dispersion strengthened Nickel based Corrosion resistant Alloys written by and published by . This book was released on 1967 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Dispersion Strengthened Nickel Base Alloy Using the High Intensity Arc Process written by H. M. McCullough and published by . This book was released on 1967 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alloy Design and Characterization of Strengthened Nickel based Superalloys for Additive Manufacturing written by Jinghao Xu and published by Linköping University Electronic Press. This book was released on 2021-01-28 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nickel-based superalloys, an alloy system bases on nickel as the matrix element with the addition of up to 10 more alloying elements including chromium, aluminum, cobalt, tungsten, molybdenum, titanium, and so on. Through the development and improvement of nickel-based superalloys in the past century, they are well proved to show excellent performance at the elevated service temperature. Owing to the combination of extraordinary high-temperature mechanical properties, such as monotonic and cyclic deformation resistance, fatigue crack propagation resistance; and high-temperature chemical properties, such as corrosion and oxidation resistance, phase stability, nickel-based superalloys are widely used in the critical hot-section components in aerospace and energy generation industries. The success of nickel-based superalloy systems attributes to both the well-tailored microstructures with the assistance of carefully doped alloying elements, and the intently developed manufacturing processes. The microstructure of the modern nickel-based superalloys consists of a two-phase configuration: the intermetallic precipitates (Ni,Co)3(Al,Ti,Ta) known as γ′ phase dispersed into the austenite γ matrix, which is firstly introduced in the 1940s. The recently developed additive manufacturing (AM) techniques, acting as the disruptive manufacturing process, offers a new avenue for producing the nickel-based superalloy components with complicated geometries. However, γ′ strengthened nickel-based superalloys always suffer from the micro-cracking during the AM process, which is barely eliminated by the process optimization. On this basis, the new compositions of γ′ strengthened nickel-based superalloy adapted to the AM process are of great interest and significance. This study sought to design novel γ′ strengthened nickel-based superalloys readily for AM process with limited cracking susceptibility, based on the understanding of the cracking mechanisms. A two-parameter model is developed to predict the additive manufacturability for any given composition of a nickel-based superalloy. One materials index is derived from the comparison of the deformation-resistant capacity between dendritic and interdendritic regions, while another index is derived from the difference of heat resistant capacity of these two spaces. By plotting the additive manufacturability diagram, the superalloys family can be categorized into the easy-to-weld, fairly-weldable, and non-weldable regime with the good agreement of the existed knowledge. To design a novel superalloy, a Cr-Co-Mo-W-Al-Ti-Ta-Nb-Fe-Ni alloy family is proposed containing 921,600 composition recipes in total. Through the examination of additive manufacturability, undesired phase formation propensity, and the precipitation fraction, one composition of superalloy, MAD542, out of the 921,600 candidates is selected. Validation of additive manufacturability of MAD542 is carried out by laser powder bed fusion (LPBF). By optimizing the LPBF process parameters, the crack-free MAD542 part is achieved. In addition, the MAD542 superalloy shows great resistance to the post-processing treatment-induced cracking. During the post-processing treatment, extensive annealing twins are promoted to achieve the recrystallization microstructure, ensuring the rapid reduction of stored energy. After ageing treatment, up to 60-65% volume fraction of γ′ precipitates are developed, indicating the huge potential of γ′ formation. Examined by the high-temperature slow strain rate tensile and constant loading creep testing, the MAD542 superalloy shows superior strength than the LPBF processed and hot isostatic pressed plus heat-treated IN738LC superalloy. While the low ductility of MAD542 is existed, which is expected to be improved by modifying the post-processing treatment scenarios and by the adjusting building direction in the following stages of the Ph.D. research. MAD542 superalloy so far shows both good additive manufacturability and mechanical potentials. Additionally, the results in this study will contribute to a novel paradigm for alloy design and encourage more γ′-strengthened nickel-based superalloys tailored for AM processes in the future.

Download or read book Statistical Design and Analysis of Optimum Seeking Experiments to Develop a Gamma prime Strengthened Cobalt nickel Base Alloy written by Gary Dale Sandrock and published by . This book was released on 1969 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statistical analysis and design for optimizing gamma-prime strengthened cobalt-nickel base alloy composition.

Download or read book The Development and Evaluation of a Cobalt Base Oxidation Resistant Dispersion Strengthened Alloy written by and published by . This book was released on 1971 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dispersion Strengthening of Metals written by Facundo Rolf Morral and published by . This book was released on 1977 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Precipitation Hardened Dispersion Strengthened Nickel Chromium Alloys written by C. R. Cook and published by . This book was released on 1969 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nickel Cobalt and Their Alloys written by Joseph R. Davis and published by ASM International. This book was released on 2000-01-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive guide to the compositions, properties, processing, performance, and applications of nickel, cobalt, and their alloys. It includes all of the essential information contained in the ASM Handbook series, as well as new or updated coverage in many areas in the nickel, cobalt, and related industries.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1967 with total page 2300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dispersion Strengthened Nickel Base Alloys Produced by Internal and Surface Oxidation written by Manohar Singh Grewal and published by . This book was released on 1972 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975-04 with total page 1082 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Directory of High Temperature Corrosion Research written by and published by . This book was released on 1971 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The directory lists the organizations, together with the investigators and the research areas (or specific programs) in which they are working, alphabetically by countries. There are 178 organizations from eleven NATO countries included. A category index indicates the high-temperature corrosion research areas in which the various organizations are conducting research. The two research areas currently receiving the most attention are (1) material behavior under corrosion and (2) reaction kinetics and diffusion processes, in which 119 and 97 organizations, respectively, are working. An alphabetical index of investigators includes approximately 240 names. (Author).