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The structure and properties of grain boundaries in B2 ordered alloys

Description: This report covers the period from April 1, 1989 to March 30, 1990. During this period further extrusions of fine-grained alloys of FeAl and NiAl with different aluminum contents were produced. Thus far, researchers have (1) completed room temperature mechanical testing which shows that the yield strength, {sigma}{sub y}, of FeAl shows a minimum near Fe-45Al while that for NiAl increases with increasing (nickel-rich) deviation from stoichiometry; (2) showed that the grain boundary strengthening… more
Date: April 16, 1990
Creator: Baker, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PDC IC WELD FAILURE EVALUATION AND RESOLUTION

Description: During final preparations for start of the PDCF Inner Can (IC) qualification effort, welding was performed on an automated weld system known as the PICN. During the initial weld, using a pedigree canister and plug, a weld defect was observed. The defect resulted in a hole in the sidewall of the canister, and it was observed that the plug sidewall had not been consumed. This was a new type of failure not seen during development and production of legacy Bagless Transfer Cans (FB-Line/Hanford). Th… more
Date: April 16, 2012
Creator: Korinko, P.; Howard, S.; Maxwell, D. & Fiscus, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Large-scale Evaluation of Nickel Aluminide Rolls in a Heat-Treat Furnace at Bethelehem Steel's (Now ISG) Burns Harbor Plate Mill

Description: At Bethlehem Steel Burns Harbor Plate Division (now ISG Burns Harbor Plate Inc.)'s annealing furnace, new nickel aluminide intermetallic alloy rolls provide greater high-temperature strength and wear resistance compared to the conventional H series cast austenitic alloys currently used in the industry. Oak Ridge National Laboratory and Bethlehem (ISG) partnered under a U.S. Department of Energy, Office of Industrial Technology's Emerging Technology Deployment Program to demonstrate and evaluate… more
Date: December 16, 2003
Creator: Mengel, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHARACTERIZATION OF PLASTICALLY-INDUCED STRUCTURAL CHANGES IN A Zr-BASED BULK METALLIC GLASS USING POSITRON ANNIHILATION SPECTROCOPY

Description: Flow in metallic glasses is associated with stress-induced cooperative rearrangements of small groups of atoms involving the surrounding free volume. Understanding the details of these rearrangements therefore requires knowledge of the amount and distribution of the free volume and how that distribution evolves with deformation. The present study employs positron annihilation spectroscopy to investigate the free volume change in Zr{sub 58.5}Cu{sub 15.6}Ni{sub 12.8}Al{sub 10.3}Nb{sub 2.8} bulk m… more
Date: September 16, 2005
Creator: Flores, K M; Kanungo, B P; Glade, S C & Asoka-Kumar, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Irradiation, Annealing, and Reirradiation Effects on American and Russian Reactor Pressure Vessel Steels

Description: One of the options to mitigate the effects of irradiation on reactor pressure vessels (RPVs) is to thermally anneal them to restore the toughness properties that have been degraded by neutron irradiation. Even though a postirradiation anneal may be deemed successful, a critical aspect of continued RPV operation is the rate of embrittlement upon reirradiation. There are insufficient data available to allow for verification of available models of reirradiation embrittlement or for the development… more
Date: June 16, 1998
Creator: Chernobaeva, A.A.; Korolev, Y.N.; Nanstad, R.K.; Nikolaev, Y.A. & Sokolov, M.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The structure and properties of grain boundaries in B2 ordered alloys. Progress report

Description: This report covers the period from April 1, 1989 to March 30, 1990. During this period further extrusions of fine-grained alloys of FeAl and NiAl with different aluminum contents were produced. Thus far, researchers have (1) completed room temperature mechanical testing which shows that the yield strength, {sigma}{sub y}, of FeAl shows a minimum near Fe-45Al while that for NiAl increases with increasing (nickel-rich) deviation from stoichiometry; (2) showed that the grain boundary strengthening… more
Date: April 16, 1990
Creator: Baker, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical Properties and Fracture Behavior of Nanoporous Au

Description: Nanoporous metals have recently attracted considerable interest fueled by potential sensor and actuator applications. From a material science point of view, one of the key issues in this context is the synthesis of nanoporous metals with both high tensile and compressive strength. Nanoporous gold (np-Au) has been suggested as a candidate material for this application due to its monolithic character. The material can be synthesized by electrochemically-driven dealloying of Ag-Au alloys, and exhi… more
Date: June 16, 2005
Creator: Biener, J.; Hodge, A. M.; Wang, Y. M.; Hayes, J. R. & Hamza, A. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Emerging Magnetism Arising from Self-Damage in (alpha) and (delta)-Pu

Description: As a consequence of the unusual nature of plutonium's electronic structure, point- and extended-defects are expected to, and do exhibit extraordinary properties[1]. Low temperature magnetic susceptibility measurements on Pu and fcc-Pu(Ga) show that the magnetic susceptibility increases as a function of time, yet upon annealing the specimen returns to its initial magnetic susceptibility. This excess magnetic susceptibility (EMS) arises from the {alpha}-decay and U recoil damage cascades which pr… more
Date: November 16, 2005
Creator: McCall, S. K.; Fluss, M. J.; Chung, B. W.; Chapline, G. F.; Jackson, D. D. & McElfresh, M. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Method to Improve Activation of Implanted Dopants in SiC

Description: Implantation of dopant ions in SiC has evolved according to the assumption that the best electrical results (i.e., carrier concentrations and mobility) is achieved by using the highest possible processing temperature. This includes implantation at > 600 C followed by furnace annealing at temperatures as high as 1,750 C. Despite such aggressive and extreme processing, implantation suffers because of poor dopant activation, typically ranging between < 2%--50% with p-type dopants represented… more
Date: January 16, 2001
Creator: Holland, O.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Particle-induced amorphization complex ceramic

Description: The presently funded three-year research program, supported by the Division of Materials Sciences of the Office of Basic Energy Sciences, was initiated on August 1, 1993; during the period in which the grant will have been active, $249,561 of support have been provided to date with an additional $79,723 to be spent during the third, final year (ending July 30, 1996). The primary purpose of the program is to develop an understanding of heavy-particle radiation effects -- {alpha}-recoil nuclei, f… more
Date: February 16, 1996
Creator: Ewing, R. C. & Wang, Lu-Min
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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