A 6061 aluminum probe was quenched with the CHTE probe-quenching system in distilled water while varying bath temperature and the level of agitation. Time vs. temperature data was collected during the quench by use of an ungrounded K-type thermocouple embedded inside the probe. Cooling rates and heat transfer coefficients, h, were calculated and Quench Factor Analysis (QFA) was also performed to quantitatively classify the quench severity. The data showed an increase in both maximum cooling rate and heat transfer coefficient and a decrease in the Quench Factor, Q, as bath temperature decreased and agitation level increased. Maximum heat transfer coefficient values ranged from 1000 W/m2K to 3900 W/m2K while maximum cooling rates of 50¡ÃƒÂ£C/s to 190¡ÃƒÂ£C/s were achieved. In addition, it was found that at higher levels of agitation, there was also an increase in the variation (i.e. standard deviation) of the cooling rate and therefore h and Q.
| Identifer | oai:union.ndltd.org:wpi.edu/oai:digitalcommons.wpi.edu:etd-theses-1477 |
| Date | 29 April 2002 |
| Creators | Fontecchio, Marco |
| Contributors | Ronald R. Biederman, Committee Member, Richard D. Sisson, Jr., Advisor, Md. Maniruzzaman, Committee Member |
| Publisher | Digital WPI |
| Source Sets | Worcester Polytechnic Institute |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Masters Theses (All Theses, All Years) |
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