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Overcoming residual stresses and machining distortion in the production of aluminum alloy satellite boxes.

Description: Distortion frequently occurs during machining of age hardening aluminum alloys due to residual stresses introduced during the quenching step in the heat treatment process. This report quantifies, compares, and discusses the effectiveness of several methods for minimizing residual stresses and machining distortion in aluminum alloys 7075 and 6061.
Date: November 1, 2007
Creator: Younger, Mandy S. & Eckelmeyer, Kenneth Hall
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aluminum alloys for satellite boxes : engineering guidelines for obtaining adequate strength while minimizing residual stresses and machining distortion.

Description: This report provides strategies for minimizing machining distortion in future designs of aluminum alloy satellite boxes, based in part on key findings from this investigation. The report outlines types of aluminum alloys and how they are heat treated, how residual stresses develop during heat treatment of age hardening alloys, ways residual stresses can be minimized, and the design of machining approaches to minimize distortion in parts that contain residual stresses. Specific recommendations a… more
Date: November 1, 2007
Creator: Younger, Mandy S. & Eckelmeyer, Kenneth Hall
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement

Description: Mechanically alloyed oxide dispersion strengthened (ODS) Fe-Cr-Al alloy thin walled tubes and sheets, produced via powder processing and consolidation methodologies are promising materials for eventual use at temperatures up to 1200 C in the power generation industry, far above the temperature capabilities of conventional alloys. Target end-uses range from gas turbine combustor liners to high aspect ratio (L/D) heat exchanger tubes. Grain boundary creep processes at service temperatures, partic… more
Date: September 30, 2007
Creator: Kad, Bimal
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

EXAMINATION OF 80 DEGREES C DESORPTION ISOTHERMS OFTRITIUM AGED PD/K AND LANA.75

Description: Metal hydrides, specifically Pd deposited on kieselguhr (Pd/k) and LaNi{sub 4.25}Al{sub 0.75} (LANA.75), have been used at the Savannah River Site for almost twenty years for hydrogen isotope separation and storage. Radiolytic decay of tritium to helium-3 in the metal matrix causes three classic changes in the performance of the hydride: the plateau pressure decreases, the plateau slope increases, and a heel forms, reducing the reversible capacity of the hydride. Deuterium and tritium isotherms… more
Date: August 28, 2007
Creator: Staack, G; Kirk Shanahan, K; Tom Walters, T & Roger Pilgrim, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

COMMENT ON TRITIUM ABSORPTION-DESORPTION CHARACTERISTICS OF LANI4.25AL0.75

Description: The thermodynamic data for LaNi{sub 4.25}Al{sub 0.75} tritide, reported by Wang et al. (W.-d. Wang et al., J. Alloys Compd. (2006) doi:10.1016/j.jallcom.206.09.122), are in variance with our published data. The plateau pressures for the P-C-T isotherms at all temperatures are significantly lower than published data. As a result, the derived thermodynamic parameters, {Delta}H{sup o} and {Delta}S{sup o}, are questionable. Using the thermodynamic parameters derived from the data reported by Wang e… more
Date: April 10, 2007
Creator: Walters, T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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