ductile-brittle fracture transition temp
ductile-brittle fracture transition temp
(OP)
I having problem to determine the transtion temperature of ductile to brittle fracture. Is that comment tensile test can do this test. HOw can i get the transition temperature. What should i call this type of test fixture so i can find it in the WWW?
RE: ductile-brittle fracture transition temp
The fracture energy (either in Joules or ft-lbs) is then plotted vs. temperature to determine the transition temperature.
Sometimes called the Charpy V-notch (CVN) test.
Lots of data, the test method is 50-60 years old.
It is also used to study the effect of microstructure, alloy composition, etc. at room T.
See ASTM E23-02a Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
http://www.astm.org/DATABASE.CART/REDLINE_PAGES/E23.htm
RE: ductile-brittle fracture transition temp
maui
RE: ductile-brittle fracture transition temp
RE: ductile-brittle fracture transition temp
In its theory the transition occurs when the strain, inhibited by lower temperature, can not occur rapidly enough to accommodate the applied stress. Fracture may occur after a finite amount of initial strain, however, depending upon what you decide to accept. Look up general test specifications at:
http://www.astm.org
Fracture occurs when the part fails through rapid crack propagation fully across any given cross-section. The notch pre-determines the "crack" size and geometry. The fracture surface will be jagged and consist of a great deal of exposed, granular facets.