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Title: FInal Report - Investment Casting Shell Cracking

Abstract

This project made a significant contribution to the understanding of the investment casting shell cracking problem. The effects of wax properties on the occurrence of shell cracking were demonstrated and can be measured. The properties measured include coefficient of thermal expansion, heating rate and crystallinity of the structure. The important features of production molds and materials properties have been indicated by case study analysis and fractography of low strength test bars. It was found that stress risers in shell cavity design were important and that typical critical flaws were either oversize particles or large pores just behind the prime coat. It was also found that the true effect of fugitive polymer fibers was not permeability increase, but rather a toughening mechanism due to crack deflection.

Authors:
Publication Date:
Research Org.:
Tri-State University (US)
Sponsoring Org.:
USDOE Office of Industrial Technologies (OIT) (EE-20) (US)
OSTI Identifier:
819623
Report Number(s):
DOE/ID13845
TRN: US200324%%380
DOE Contract Number:  
FC07-00ID13845
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Dec 2003
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; 42 ENGINEERING; CASTING; DEFECTS; DESIGN; FIBERS; FRACTOGRAPHY; HEATING RATE; PERMEABILITY; POLYMERS; PRODUCTION; THERMAL EXPANSION; INVESTMENT CASTING; SHELL CRACKING; PATTERN WAX; CERAMIC MOLD SHELLS

Citation Formats

Von Richards. FInal Report - Investment Casting Shell Cracking. United States: N. p., 2003. Web. doi:10.2172/819623.
Von Richards. FInal Report - Investment Casting Shell Cracking. United States. doi:10.2172/819623.
Von Richards. Mon . "FInal Report - Investment Casting Shell Cracking". United States. doi:10.2172/819623. https://www.osti.gov/servlets/purl/819623.
@article{osti_819623,
title = {FInal Report - Investment Casting Shell Cracking},
author = {Von Richards},
abstractNote = {This project made a significant contribution to the understanding of the investment casting shell cracking problem. The effects of wax properties on the occurrence of shell cracking were demonstrated and can be measured. The properties measured include coefficient of thermal expansion, heating rate and crystallinity of the structure. The important features of production molds and materials properties have been indicated by case study analysis and fractography of low strength test bars. It was found that stress risers in shell cavity design were important and that typical critical flaws were either oversize particles or large pores just behind the prime coat. It was also found that the true effect of fugitive polymer fibers was not permeability increase, but rather a toughening mechanism due to crack deflection.},
doi = {10.2172/819623},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {12}
}