Dynamic Strain Ageing in a Twin-Induced Plasticity Steel

Jiang Ying Meng; Li He Qian; Peng Cheng Guo; Fu Cheng Zhang

doi:10.4028/www.scientific.net/MSF.750.88

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HomeMaterials Science ForumMaterials Science Forum Vol. 750Dynamic Strain Ageing in a Twin-Induced Plasticity...

Dynamic Strain Ageing in a Twin-Induced Plasticity Steel

Abstract:

This work was to clarify the characteristics of serrated flow in an austenitic FeMnC twin-induced plasticity (TWIP) steel at room temperature (RT) using both strain- and crosshead displacement-controlled tensile tests. Three types of serrations were observed in strain-controlled but not in displacement-controlled tests, indicating that strain-controlled tensile tests provide more deformation details. The occurrence of the different types of serrations depends on both strain rate and strain level. Type C serrations were observed in TWIP steels at RT for the first time. The critical strain for the onset of serrations exhibits a positive strain rate dependence at higher strain rates, whereas an “inverse” critical strain behavior was observed in the lower strain rate region.

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Materials Science Forum (Volume 750)

Pages:

88-91

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.750.88

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Online since:

March 2013

Authors:

Jiang Ying Meng, Li He Qian, Peng Cheng Guo, Fu Cheng Zhang

Keywords:

Dynamic Strain Aging (DSA), Mechanical Behavior, Twin-Induced Plasticity Steels

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