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Re: Is heat treatment affect Youngs modulus (Modulus of Elasticity)
Re: Is heat treatment affect Youngs modulus (Modulus of Elasticity) -- shiva2207	Post Reply	Top of thread	Forum

Posted by: Bender ® 05/01/2006, 13:54:33 Author Profile eMail author Edit

It is interesting that you should post this question since I have recently been asking the same thing. Apparently Young's Modulus does not change in a given material with different amounts of coldwork and or temper. When I read this in some literature so I called some techies at Specialty Metals and they backed the statement up. Whether that applies to all metals I'm not sure, I was inquiring about Inconel 600. Intuitivly, at first, it would seem logical that E does change depending on a material's temper/work hardened state. You probably are aware that it does change with temperature. I am still trying to wrap my head around it not changing in the other cases.

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Re: Is heat treatment affect Youngs modulus (Modulus of Elasticity)
Re: Is heat treatment affect Youngs modulus (Modulus of Elasticity) -- shiva2207	Post Reply	Top of thread	Forum

Posted by: Diego ® 04/28/2006, 05:55:51 Author Profile eMail author Edit

Young Modulus is related to the alloy mocrostructure. Under load it is deformed in a characteristic way, which is different for each materials. About steel, consider that the deformation imposed to the main matrix, by the different particles added to realise any kind of alloy, are not able to change significantly the Y. modulus. I am working on plasticity, and we are trying to evaluate this change during large plastic deformation, and I ensure you it's a very difficult task. Besides, you may have a change of Y. during heating, if you cross the boundary between different microstructure: form martensite to austenite for instance. That's what happens when you use Shape Memory Alloy. If you simply heat / cool down a material without chance its structure, you are simply adding a new (hidden) positive / negative force. The amplitude of which depends on the joints: if you are trying to stretch a sample to a certain length, you may apply a force by sigma=epsilon*E where the epsilon is the one you need; or heat it according with the equation delta.L=initial.length*delta.T*alfa, where alfa is the linear coeff of dilatation.

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