Indentation Stress Relaxation Behavior in As-Deposited and Rolling Nanocrystalline NiFe

Abstract:

The stress relaxation behavior of as-deposited and rolling nanocrystalline NiFe alloy was studied by nanoindentation tests. The results indicated that both the hardness and activation volume of rolling NiFe are larger than that of as-deposited samples. Furthermore, the hardness decreases with increasing indentation depth. The reduction of indentation stress during holding becomes much faster with decreasing the indentation depth. Dislocation density is remarkably enhanced by rolling deformation, leading to the hardening behavior. Dislocation multiplication and accumulation mediated process is believed to the dominant plastic deformation mechanism.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 352-356
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.352
• Online since: February 2013
• Authors: Z.H. Cao, Xiang Kang Meng
• Keywords: Rolling , Activation Volume, Nanocrystalline, Stress Relaxation

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