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A brief study of delayed fracture in a seam-welded titanium panel is summarized in this memorandum. Examination of the fracture surface with electron microscopy showed that the material cleaved, failing in a brittle manner. Although the nature of the embrittlement was not clearly defined, titanium hydride phase was suspected as a prime contributor to failure. Even though the hydrogen content of the titanium was only 65 ppm, hydride embrittlement was thought to have occurred from precipitation of hydride platelets on crystal planes oriented normal to welding stresses. Other work, briefly discussed in the memorandum, has confirmed that hydride platelets in titanium can be oriented by stress and that tensile ductility of Zircaloy (which behaves similarly with respect to hydrogen, to titanium) depends upon hydride orientation. Stress-relief annealing of welded titanium structures is recommended wherever possible to minimize embrittlement by stress-oriented hydrides. (Author).
Book Synopsis Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet by : R. H. Ernst
Download or read book Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet written by R. H. Ernst and published by . This book was released on 1964 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief study of delayed fracture in a seam-welded titanium panel is summarized in this memorandum. Examination of the fracture surface with electron microscopy showed that the material cleaved, failing in a brittle manner. Although the nature of the embrittlement was not clearly defined, titanium hydride phase was suspected as a prime contributor to failure. Even though the hydrogen content of the titanium was only 65 ppm, hydride embrittlement was thought to have occurred from precipitation of hydride platelets on crystal planes oriented normal to welding stresses. Other work, briefly discussed in the memorandum, has confirmed that hydride platelets in titanium can be oriented by stress and that tensile ductility of Zircaloy (which behaves similarly with respect to hydrogen, to titanium) depends upon hydride orientation. Stress-relief annealing of welded titanium structures is recommended wherever possible to minimize embrittlement by stress-oriented hydrides. (Author).
Book Synopsis Index to DMIC Reports and Memoranda by : Battelle Memorial Institute. Defense Metals Information Center
Download or read book Index to DMIC Reports and Memoranda written by Battelle Memorial Institute. Defense Metals Information Center and published by . This book was released on 1968 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Porosity in fusion welds in titanium has been encountered to some extent in all programs using this joining method. While measures to control cleanliness and to employ good welding techniques have successfully reduced the occurrence of porosity, specific indentification of the various causes of porosity is still lacking. Some factors suspected of causing porosity in titanium welds are hydrogen, cleanliness of joint area, contamination in filler wire, and welding procedures and techniques.
Book Synopsis Porosity in Titanium Welds by : Robert Melvin Evans
Download or read book Porosity in Titanium Welds written by Robert Melvin Evans and published by . This book was released on 1964 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porosity in fusion welds in titanium has been encountered to some extent in all programs using this joining method. While measures to control cleanliness and to employ good welding techniques have successfully reduced the occurrence of porosity, specific indentification of the various causes of porosity is still lacking. Some factors suspected of causing porosity in titanium welds are hydrogen, cleanliness of joint area, contamination in filler wire, and welding procedures and techniques.
Book Synopsis Stress-corrosion Cracking of Aluminum Alloys by : J. D. Jackson
Download or read book Stress-corrosion Cracking of Aluminum Alloys written by J. D. Jackson and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
The memorandum summarizes current knowledge concerning the machining of titanium alloys. The memorandum deals with the following conventional machining operations: milling, face milling, peripheral milling, turning, boring, drilling, tapping, and grinding. The last section of the memorandum deals with chemical milling operations.
Book Synopsis Machining of Titanium Alloys by : C. T. Olofson
Download or read book Machining of Titanium Alloys written by C. T. Olofson and published by . This book was released on 1965 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The memorandum summarizes current knowledge concerning the machining of titanium alloys. The memorandum deals with the following conventional machining operations: milling, face milling, peripheral milling, turning, boring, drilling, tapping, and grinding. The last section of the memorandum deals with chemical milling operations.
Book Synopsis The Production of Powder-metallurgy Tungsten Sheet and Plate by : D. J. Maykuth
Download or read book The Production of Powder-metallurgy Tungsten Sheet and Plate written by D. J. Maykuth and published by . This book was released on 1964 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrodeposited, Electroless, and Anodized Coatings on Beryllium by : John G. Beach
Download or read book Electrodeposited, Electroless, and Anodized Coatings on Beryllium written by John G. Beach and published by . This book was released on 1964 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summary of the Ninth Meeting of the Refractory Composites Working Group by : E. S. Bartlett
Download or read book Summary of the Ninth Meeting of the Refractory Composites Working Group written by E. S. Bartlett and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Report on the Fourth Maraging-steel Project Review by : Albert M. Hall
Download or read book Report on the Fourth Maraging-steel Project Review written by Albert M. Hall and published by . This book was released on 1964 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
