A method for measuring static recrystallization volume fraction of materials
A technology of static recrystallization and volume fraction, applied in the direction of material crystallization, material thermal analysis, material analysis, etc., can solve the problems of unspecified double-pass deformation conditions, pass deformation, systematic error, accidental error, etc.
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[0033] The specific embodiment of the present invention is:
[0034] 1. Select a low-carbon micro-alloy steel as the material to be tested, and use a thermal simulation testing machine to conduct a set of single-pass compression tests. The test process for the sample is to heat the sample at 20°C / s to 1150°C and hold it for 5 minutes. Then cool to 850°C and 950°C at a speed of 5°C / s, and carry out compression deformation after holding at this temperature for 1 minute, the deformation amount is 70%, and the strain rate is 5S -1 ; Collect the stress and strain data in the test process to obtain the stress-strain curve;
[0035] Data fitting and differential operations are performed on the single-pass stress-strain curves obtained by deformation at 850°C and 950°C to obtain the relationship curve between the work hardening rate and the corresponding stress. It can be seen from the curve that at 950°C The inflection point of the curve during deformation indicates that dynamic rec...
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