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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Stress relief cracking in copper-precipitation strengthened HSLA-100 steel

McNutt, Steven A. 12 1900 (has links)
Approved for public release; distribution is unlimited / The US Navy is currently developing a new family of high-strength , low-alloy steels which derive a significant portion of their strength from copper precipitation. These highly weldable steels require little or no preheat. resulting in substantial cost savings. The first of these steels. HSLA-80, has been certified for ship construction, but recent studies have indicated some susceptibility to stress relief cracking in weldments. HSLA-100, a modification of HSLA-80, is now being considered for several higher-strength naval structures. Stress-relief cracking has not been studied previously in this steel and is the subject of investigation in this work. The steel weldments were loaded below their yield strength, heated to temperatures of 550°-650° C, and permitted to stress relieve for one hour. At all temperatures, the steel exhibited susceptibility to stress relief cracking in certain stress ranges. Optical and scanning electron microscopy exhibited intergranular cracking which always traversed the coarse-grained region of the heat-affected zone. Auger and transmission electron microscopy indicated high concentrations of alloying elements at the grain boundaries. Stress-relief cracking was associated with the diffusion of alloying elements to the prior austenite grain boundaries. / http://archive.org/details/stressreliefcrac00mcnu / Captain, Canadian Forces
2

Phase Transformation Behavior and Stress Relief Cracking Susceptibility in Creep Resistant Steels

Strader, Katherine C. January 2014 (has links)
No description available.
3

Stress Relief Cracking in Low Alloy Creep Resistant Steels

Sarich, Conner M. January 2021 (has links)
No description available.
4

Welding Metallurgy of Nickel-Based Superalloys for Power Plant Construction

Tung, David C. January 2015 (has links)
No description available.
5

Weldability Evaluation in Autogenous Welds of Alloys 230, 800H, and 825

Suh, Sanghyun January 2016 (has links)
No description available.

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