Mechanical properties of thin-wall ductile iron
- Intermet Corp., Lynchburg, VA
The use of cast iron in automotive applications in this era of increasing fuel efficiency requires the ability to cast very thin sections (2-7 mm). Although thin-wall iron castings have been produced, difficulty arises in predicting the mechanical properties of these castings because mechanical behavior is closely related to thickness, which in turn is a direct consequence of the section cooling rate. Experiments relating casting thickness with ultimate tensile strength, elongation, reduction in area, and hardness were performed. An inverse relationship was found between ultimate tensile strength and thickness. Elongation was found to depend only on the thickness of the sample and approached zero as the thickness of the sample decreased below 1.5 mm. Percent reduction in area was found to depend linearly on thickness. Although average hardness also correlated with the inverse of thickness, it was not found to be a useful measure of ultimate tensile strength. The results of this study show that cooling rate of the thin wall casting very much affects the mechanical properties.
- Research Organization:
- Albany Research Center (ARC), Albany, OR (United States)
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE); American Foundry Society, Des Plaines, IL
- OSTI ID:
- 900351
- Report Number(s):
- DOE/ARC-2001-021; CRADA 0976; TRN: US200711%%102
- Resource Relation:
- Conference: 2000 TMS (The Minerals, Metals & Materials Society) Annual Fall Meeting, St. Louis, MO, Oct. 8-12, 2000
- Country of Publication:
- United States
- Language:
- English
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