Download or read book Effect of Heat Treatment upon the Fatigue Crack Growth Behavior of Alloy 718 Weldments Part 1 Macroscopic Behavior written by James LA. and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Heat Treatment upon the Fatigue Crack Growth Behavior of Alloy 718 Weldments Part 2 Microscopic Behavior written by James LA. and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Heat Treatment Upon the Fatigue crack Growth Behavior of Alloy 718 Weldments Part II Microscopic Behavior written by and published by . This book was released on 1981 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructural features that influenced the room and elevated temperature fatigue-crack growth behavior of as-welded, conventional heat-treated, and modified heat-treated Alloy 718 GTA weldments were studied. Electron fractographic examination of fatigue fracture surfaces revealed that operative fatigue mechanisms were dependent on microstructure, temperature and stress intensity factor. All specimens exhibited three basic fracture surface appearances at temperatures up to 838°C: crystallographic faceting at low stress intensity range (?K) levels, striation formation at intermediate values, and dimples coupled with striations in the highest?K regime. At 649°C, the heat-treated welds exhibited extensive intergranular cracking. Laves and?particles in the conventional heat-treated material nucleated microvoids ahead of the advancing crack front and caused an overall acceleration in crack growth rates at intermediate and high?K levels. The modified heat treatment removed many of these particles from the weld zone, thereby improving its fatigue resistance. The dramatically improved fatigue properties exhibited by the as-welded material was attributed to compressive residual stresses introduced by the welding process. 16 figures.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1991-10 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 8th International Symposium on Superalloy 718 and Derivatives written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2014-12-02 with total page 951 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Heat Treatment Upon the Fatigue crack Growth Behavior of Alloy 718 Weldments written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructural features that influenced the room and elevated temperature fatigue-crack growth behavior of as-welded, conventional heat-treated, and modified heat-treated Alloy 718 GTA weldments were studied. Electron fractographic examination of fatigue fracture surfaces revealed that operative fatigue mechanisms were dependent on microstructure, temperatures and stress intensity factor. All specimens exhibited three basic fracture surface appearances at temperatures up to 538°C: crystallographic faceting at low stress intensity range ([Delta]K) levels, striation, formation at intermediate values, and dimples coupled with striations in the highest ([Delta]K) regime. At 649°C, the heat-treated welds exhibited extensive intergranular cracking. Laves and [delta] particles in the conventional heat-treated material nucleated microvoids ahead of the advancing crack front and caused on overall acceleration in crack growth rates at intermediate and high [Delta]K levels. The modified heat treatment removed many of these particles from the weld zone, thereby improving its fatigue resistance. The dramatically improved fatigue properties exhibited by the as-welded material was attributed to compressive residual stresses introduced by the welding process. 19 refs., 16 figs.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1985 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Welding the Inconel 718 Superalloy written by S.G.K. Manikandan and published by Elsevier. This book was released on 2019-05-29 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding the Inconel 718 Superalloy: Reduction of Micro-segregation and Laves Phases explores the day-to-day welding business in Alloy 718 and presents solutions to avoid or minimize micro-segregation. It considers the limitations of changing from lab scale models to actual production models and presents new technologies with proven experimental background. Various case studies are presented within the text, as well as proposed solutions backed by experimental evidence. Items previewed in this edition include enhanced cooling rates in the GTA welding process with cryogenic cooling and enhanced dendrite refinement using modified pulse waveform. This work will be useful to researchers from the aerospace, space, power generation, nuclear, and chemical industries, as well as students interested in superalloys and welding. - Resolves the industrial limitations in reducing the formation of laves phases in the welding of alloy 718 - Presents case studies in industrial applications - Discusses new technologies with proven experimental background - Includes a comparison of laves size and distribution between GTAW, EBW, LBW and FW
Download or read book Paper written by and published by . This book was released on 1981 with total page 1082 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Engineering Materials and Technology written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Weld Heat affected Zone Hot Cracks on the Fatigue Crack Growth Behavior of As cast Alloy 718 written by Edwin L. Bradley and published by . This book was released on 1988 with total page 130 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 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Technology written by and published by . This book was released on 1986 with total page 390 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 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 1234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
