Relations Between Microstructure And Greep Rupture Properties Of Nickel Base Alloys As Revealed By Overtemperature Exposures

Author : John P. Rowe
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.49/5 ( download)

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Download or read book Relations Between Microstructure and Creep-rupture Properties of Nickel-base Alloys as Revealed by Overtemperature Exposures written by John P. Rowe and published by . This book was released on 1962 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : JOHN P. ROWE J.W. FREEMAR
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.73/5 ( download)

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Download or read book RELATIONS BETWEEN MICROSTRUCTURE AND GREEP-RUPTURE PROPERTIES OF NICKEL-BASE ALLOYS AS REVEALED BY OVERTEMPERATURE EXPOSURES written by JOHN P. ROWE J.W. FREEMAR and published by . This book was released on 1961 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 668 pages
Book Rating : 4.91/5 ( download)

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Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 718 pages
Book Rating : 4.40/5 ( download)

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Download or read book Guide to Annual Subject Index for Technical Publications Announcements, Apr.-Dec. 1962 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author :
Publisher :
ISBN 13 :
Total Pages : 1090 pages
Book Rating : 4.4N/5 ( download)

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Download or read book Dissertation Abstracts International written by and published by . This book was released on 1970 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Library of Congress
Publisher :
ISBN 13 :
Total Pages : 620 pages
Book Rating : 4.66/5 ( download)

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Download or read book Library of Congress Catalogs written by Library of Congress and published by . This book was released on 1964 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Library of Congress
Publisher :
ISBN 13 :
Total Pages : 618 pages
Book Rating : 4.91/5 ( download)

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Download or read book Subject Catalog written by Library of Congress and published by . This book was released on 1960 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Library of Congress
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.25/5 ( download)

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Download or read book Library of Congress Catalog written by Library of Congress and published by . This book was released on 1960 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cumulative list of works represented by Library of Congress printed cards.

Author :
Publisher :
ISBN 13 :
Total Pages : 1624 pages
Book Rating : 4.03/5 ( download)

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Download or read book Dissertation Abstracts written by and published by . This book was released on 1962-04 with total page 1624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of dissertations and monographs in microform.

Author : Jinghao Xu
Publisher : Linköping University Electronic Press
ISBN 13 : 9179297269
Total Pages : 63 pages
Book Rating : 4.68/5 ( download)

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Download or read book Alloy Design and Characterization of γ′ 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.