Analysis of Welded Structures. Residual Stresses, by Koichi Masubuchi PDF

By Koichi Masubuchi

ISBN-10: 0080227147

ISBN-13: 9780080227146

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Extra info for Analysis of Welded Structures. Residual Stresses, Distortion, and Their Consequences

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5xxx series. This is the most important material for structural applications. It is a weldable Mg-Mn alloy formable, highly corrosion resistant, has a high weld zone ductility and high strength. Advances in 5052, 5083, 5086, and 5456 welding make realistic the welding of aluminum in applications where welds are subject to heavy dynamic loading. 6xxx series. A heat-treatable material, this alloy has sheets, plate and extrusions two-thirds to three-quarters less in strength than the 2xxx series. However, it is easily available, weldable and cheap, which makes it practical for structures with low dynamic loading factors.

The low-temperature phase of this process is designated alpha titanium. The high-temperature phase is beta titanium/119) The addition of alloying elements to titanium either raises or lowers the transformation temperature and slows down or speeds up the transformation from the high-temperature beta phase to the room-temperature alpha phase. Titanium alloys are classified into alpha, alpha-beta, and beta types, depending upon the predominant phases in microstructure. (120) An addition to titanium of an element such as aluminum, tin, or oxygen raises the transformation temperature.

The designation indicates that the principal alloying elements are 6% aluminum, 6% vanadium, and 2% tin. Among these alloys, pure titanium and the Ti-6A1-4V alloy have been most commonly used for marine applications. 2. Effects of impurities and alloying elements on mechanical properties Pure titanium is very ductile and relatively low in strength. 0 ADDITION ELEMENT (wt7o) FIG. 15. Effects of impurities on mechanical properties of titanium. 002,114) impurities such as oxygen, nitrogen, and carbon causes increase in strength and a decrease in ductility.

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Analysis of Welded Structures. Residual Stresses, Distortion, and Their Consequences by Koichi Masubuchi


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