Observations On Delayed Cracking In Welded Structures Of Unalloyed Titanium Sheet

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Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet

R. H. Ernst,D. N. Williams,H. R. Ogden
Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet Book PDF

Author : R. H. Ernst,D. N. Williams,H. R. Ogden
Publisher : Unknown
Page : 12 pages
File Size : 49,5 Mb
Release : 1964
Category : Titanium
ISBN : UOM:39015095155613

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Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet by R. H. Ernst,D. N. Williams,H. R. Ogden Pdf

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).

Index to DMIC Reports and Memoranda

Battelle Memorial Institute. Defense Metals Information Center
Index to DMIC Reports and Memoranda Book PDF

Author : Battelle Memorial Institute. Defense Metals Information Center
Publisher : Unknown
Page : 38 pages
File Size : 45,9 Mb
Release : 1968
Category : Alloys
ISBN : UOM:39015095158161

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Index to DMIC Reports and Memoranda by Battelle Memorial Institute. Defense Metals Information Center Pdf

U.S. Government Research Reports

Anonim
U S Government Research Reports Book PDF

Author : Anonim
Publisher : Unknown
Page : 210 pages
File Size : 40,8 Mb
Release : 1964
Category : Science
ISBN : UOM:39015086566075

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U.S. Government Research Reports by Anonim Pdf

Porosity in Titanium Welds

Robert Melvin Evans
Porosity in Titanium Welds Book PDF

Author : Robert Melvin Evans
Publisher : Unknown
Page : 14 pages
File Size : 48,7 Mb
Release : 1964
Category : Porosity
ISBN : UOM:39015095155605

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Porosity in Titanium Welds by Robert Melvin Evans Pdf

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.

Stress-corrosion Cracking of Aluminum Alloys

J. D. Jackson,Walter K. Boyd
Stress corrosion Cracking of Aluminum Alloys Book PDF

Author : J. D. Jackson,Walter K. Boyd
Publisher : Unknown
Page : 22 pages
File Size : 54,5 Mb
Release : 1965
Category : Aluminum alloys
ISBN : UOM:39015095155662

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Stress-corrosion Cracking of Aluminum Alloys by J. D. Jackson,Walter K. Boyd Pdf

Machining of Titanium Alloys

C. T. Olofson,A. F. Gerds,F. W. Boulger,J. A. Gurklis
Machining of Titanium Alloys Book PDF

Author : C. T. Olofson,A. F. Gerds,F. W. Boulger,J. A. Gurklis
Publisher : Unknown
Page : 30 pages
File Size : 53,7 Mb
Release : 1965
Category : Machining
ISBN : UOM:39015095155738

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Machining of Titanium Alloys by C. T. Olofson,A. F. Gerds,F. W. Boulger,J. A. Gurklis Pdf

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.

Surface Damage in Machined Beryllium

Stanley W. Porembka
Surface Damage in Machined Beryllium Book PDF

Author : Stanley W. Porembka
Publisher : Unknown
Page : 18 pages
File Size : 42,6 Mb
Release : 1965
Category : Beryllium
ISBN : UOM:39015095155449

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Surface Damage in Machined Beryllium by Stanley W. Porembka Pdf

A review of machining damage effects in beryllium was made. Surface damage is caused by twinning and microcracking as a result of various machining operations. Twinning is a result of surface working while microcracks initiate at intersections of twins and grain boundaries, at twin-matrix interfaces, at impurity particles, and in heavily twinned regions. These phenomena may be due to residual stresses in wrought products as well as machining parameters such as tool type, feed, and speed and depth of cut. The loss of mechanical properties due to machining damage is reviewed. Also presented is a study of surface damage actually encountered with machining of the shingles for the Gemini spacecraft.

Compatibility of Materials with Rocket Propellants and Oxidizers

Walter K. Boyd,Warren E. Berry,E. L. White
Compatibility of Materials with Rocket Propellants and Oxidizers Book PDF

Author : Walter K. Boyd,Warren E. Berry,E. L. White
Publisher : Unknown
Page : 46 pages
File Size : 48,6 Mb
Release : 1965
Category : Liquid propellants
ISBN : UOM:39015095155811

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Compatibility of Materials with Rocket Propellants and Oxidizers by Walter K. Boyd,Warren E. Berry,E. L. White Pdf

The memorandum summarizes the available information on the compatibility of liquid rocket propellants with prominent materials of construction. Fuels and oxidizers of current interest are discussed. The corrosion data which are presented will apply to storing, handling, and control equipment outside of missiles and to missile components excluding combustion chamber. The compatibility of materials with reaction products in combustion chambers, nozzles, etc., is not considered. Included in the summary are data for many nonmetallic materials. The memorandum is subdivided into sections according to the propellant. Each material of construction is rated for a given medium as belonging to one of four classes, based primarily upon corrosion resistance. Consideration also is given to such factors as catalytic decomposition and sensitivity to impact.

Summary of the Eighth Meeting of the Refractory Composites Working Group

E. S. Bartlett,H. R. Ogden
Summary of the Eighth Meeting of the Refractory Composites Working Group Book PDF

Author : E. S. Bartlett,H. R. Ogden
Publisher : Unknown
Page : 26 pages
File Size : 40,8 Mb
Release : 1964
Category : Refractory materials
ISBN : UOM:39015095155464

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Summary of the Eighth Meeting of the Refractory Composites Working Group by E. S. Bartlett,H. R. Ogden Pdf

This memorandum summarizes information on refractory materials and composites as presented at the Eighth Meeting of the Refractory Composites Working Group in Fort Worth, Texas, January 14-16, 1964. This memorandum is based on 45 papers covering a wide variety of subjects ranging from basic studies on oxidation mechanisms to the development of specific pieces of hardware. The papers are reviewed and discussed briefly within the framework of the following four broad areas: materials technology, process technology, specific hardware applications, and evaluation techniques. Included in the section on materials technology are discussions dealing with bulk refractory materials and coatedmetal systems. Hot spraying, chemical vapor deposition, powder processes, joining, and extrusion are discussed in the section on process technology. The specific hardware applications cover rocket-motor components, nose caps, leading edges, hot skins, and fasteners. (Author).

Recent Developments in Welding Thick Titanium Plate

R. E. Monroe,D. C. Martin,R. J. Wolfe,N. Nagler
Recent Developments in Welding Thick Titanium Plate Book PDF

Author : R. E. Monroe,D. C. Martin,R. J. Wolfe,N. Nagler
Publisher : Unknown
Page : 26 pages
File Size : 48,8 Mb
Release : 1965
Category : Titanium
ISBN : UOM:39015095155522

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Recent Developments in Welding Thick Titanium Plate by R. E. Monroe,D. C. Martin,R. J. Wolfe,N. Nagler Pdf

This memorandum represents a combined effort by the U.S. Naval Applied Science Laboratory, Brooklyn, New York, and the Defense Metals Information Center to summarize new information on welding thick Ti plate. Thick plate of Ti continues to be of interest to the aerospace and defense industries for possible use in submersibles, armored vehicles, large space boosters, high-speed aircraft, and for pressure vessels. This memorandum generally is limited to information on welding Ti plate that is (1) at least 1 in. thick and (2) that is not covered by DMIC Report 185, The Status and Properties of Titanium Alloys for Thick Plate, June 14, 1963. The general requirements for welding Ti are not repeated here, since they are well documented in references mentioned in the inroduction to the memorandum. Sections have been prepared to cover material developments, welding-process developments, weld properties, and residual welding stresses. (Author).