Different material properties from a similar mild steel billet
Different material properties from a similar mild steel billet
(OP)
Hi
Recently I tested 3 samples with the same dimension and shape namely T1, T2 and T3.
All was cut from the same mild steel billet. T1 was cut vertically across the billet whilst T3 and T4 were cut in horizontal direction.
T1 underwent strain gauge measuremnt before it was tensile tested on INSTRON machine.
T3 and T4 didnt went strain gauge measurement and were tensile tested on the same machine.
The results
Young modulus (YM) for T1= 205.7 GPa
YM for T3 = 208 Gpa
YM for T4 = 312 Gpa
Why there is such discrepancies between the samples?
Thanks in advance
Recently I tested 3 samples with the same dimension and shape namely T1, T2 and T3.
All was cut from the same mild steel billet. T1 was cut vertically across the billet whilst T3 and T4 were cut in horizontal direction.
T1 underwent strain gauge measuremnt before it was tensile tested on INSTRON machine.
T3 and T4 didnt went strain gauge measurement and were tensile tested on the same machine.
The results
Young modulus (YM) for T1= 205.7 GPa
YM for T3 = 208 Gpa
YM for T4 = 312 Gpa
Why there is such discrepancies between the samples?
Thanks in advance





RE: Different material properties from a similar mild steel billet
Regards,
Cory
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RE: Different material properties from a similar mild steel billet
I suspect the different setup on the machine might affect the result but I couldnt verify it as I am not familiar with the machine.
RE: Different material properties from a similar mild steel billet
RE: Different material properties from a similar mild steel billet
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(noticed in a coffee shop)
RE: Different material properties from a similar mild steel billet
Any heat treatment? That also could be a factor.
You need to find out what strain range the software is using for modulus calculation. It may be taking data out of the linear region.
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