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work hardening

Kamyar M Davoudi's picture

Eighty Years of Dislocation Theory and Work Hardening

On February 7, 1934, two consecutive papers by Sir Geoffrey Ingram Taylor were received and so the dislocation theory was born and the first attempt at describing work hardening was made. Before that date, it was known that there was a big gap between the ideal and the experimentally observed shear strength. While according to the calculations, the shear strength had to be of the order of one tenth (or with finer models one thirtieth) of the shear modulus, the measured shear strength was several orders of magnitude smaller. This large discrepancy brought about Geoffrey I.Taylor, Egon Orowan and Michael Polyani to independently postulate the existence of dislocations. Papers by Orowan and Polyani were published consecutively in one volume of Zeitschrift für Physik.

Shunlai.Zang's picture

What are the differences between "strain hardening" and "work hardening"?

I think the concepts from the constitutive theory, but in many papers the researchers seem that they dont differentiate them.  So could you give me an exact explanation about it?  Thank you.

Shun lai Zang  
B.Eng, MSc, PhD
Lectuer in Material Science and Engineering

School of Mechanical Engineering
Xi'an Jiaotong University
Xi'an ,Shaanxi,China

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