skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Heilum Bubble Accelerated Aging.

Abstract

Abstract not provided.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1406838
Report Number(s):
SAND2016-10671C
648526
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Rio Grande Symposium on Advanced Materials.
Country of Publication:
United States
Language:
English

Citation Formats

Stangebye, Sandra Elizabeth, Muntifering, Brittany R, Snow, Clark S., Hattar, Khalid Mikhiel, and Sisson, Richard. Heilum Bubble Accelerated Aging.. United States: N. p., 2016. Web.
Stangebye, Sandra Elizabeth, Muntifering, Brittany R, Snow, Clark S., Hattar, Khalid Mikhiel, & Sisson, Richard. Heilum Bubble Accelerated Aging.. United States.
Stangebye, Sandra Elizabeth, Muntifering, Brittany R, Snow, Clark S., Hattar, Khalid Mikhiel, and Sisson, Richard. 2016. "Heilum Bubble Accelerated Aging.". United States. doi:. https://www.osti.gov/servlets/purl/1406838.
@article{osti_1406838,
title = {Heilum Bubble Accelerated Aging.},
author = {Stangebye, Sandra Elizabeth and Muntifering, Brittany R and Snow, Clark S. and Hattar, Khalid Mikhiel and Sisson, Richard},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month =
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The B61 accelerated aging unit (AAU) provided a unique opportunity to document the effects of a controlled, long-term thermal cycling environment on the aging of materials used in the device. This experiment was of particular interest to solder technologists because thermal cycling environments are a predominant source of solder joint failures in electronic assemblies. Observations of through hole solder joints in the MC2918 Firing Set from the B61 AAU did not reveal signs of catastrophic failure. Quantitative analyses of the microstructural metrics of intermetallic compound layer thickness and Pb-rich phase particle distributions indicated solder joint aging that was commensurate withmore » the accelerated aging environment. The effects of stress-enhanced coarsening of the Pb-rich phase were also documented.« less
  • The deactivation rate of a resid hydrotreating catalyst is determined by a complex set of factors involving both chemical and physical changes in the catalyst structure. The various chemical changes that are associated with resid conversion involve thermal and catalytic steps of relatively large molecular weight species with the overall rates significantly affected by mass transfer limitations. The deposition of coke and the variation in the effective promoter level by the accumulation of metals deposited from the resid are the principal factors governing deactivation. The relative importance of mass transfer restrictions on activity and catalyst deactivation can be observed inmore » studies where the average pore diameter of the catalyst has been varied. Several models have been proposed to characterize the deactivation of resid hydroprocessing catalysts. In this paper, the authors discuss some accelerated aging tests with a relatively large pore commercial hydrotreating catalyst used in their refinery hydrotreater. The activity for sulfur and metals removal from a refinery resid was monitored as a function of catalyst age in a normal life test and in two runs where the catalyst was prematurely aged by exposure to either Maya or Hondo 400 F+ resids. The results illustrate the importance of the various factors governing catalyst deactivation and the limitations in predicting catalyst life from accelerated aging tests.« less
  • The dynamic mechanical properties and molecular weight distribution of two experimental polymer bonded explosives, X-0287 and X-0298, maintained at 23, 60, and 74/sup 0/C for 3 years were examined. X-0287 is 97% 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane explosive, 1.8% Kraton G-1650, and 1.2% B/sup 2/ was 170. X-0298 is 97.4% explosive, 1.4% Kraton G-1650, and 1.2% Cenco Hi-vac oil. The relaxation associated with the Kraton rubber block glass transition is observed in both X-0287 and X-0298. In the unaged X-0298 it occurs at -59/sup 0/C and in the aged explosive at 50/sup 0/C. This is caused by migration of the oil plasticizer out ofmore » the explosive. In X-0287 the Kraton rubber block T/sub g/ is weak and broad due to the presence of the wax plasticizer. X-0287 has a second broad relaxation associated with the melting of the wax from 10 to 65/sup 0/C. The molecular weight of the Kraton binder decreased with increasing accelerated aging temperature. The oil plasticizer had no stabilizing effect, but below its melting point the wax reduced Kraton chain scission considerably. The simple random chain scission model predicted a 20.5 year use-life for X-0298, but X-0287 was stabilized against degradation below the wax melting point.« less