On the Anomalous Coffin-Manson Behavior Observed under Elevated Temperature Ratcheting in Type 316LN SS

Aritra Sarkar; Nagesha Atikukke; R. Sandhya; K. Laha

doi:10.4028/www.scientific.net/MSF.830-831.227

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HomeMaterials Science ForumMaterials Science Forum Vols. 830-831On the Anomalous Coffin-Manson Behavior Observed...

On the Anomalous Coffin-Manson Behavior Observed under Elevated Temperature Ratcheting in Type 316LN SS

Abstract:

Ratcheting is the progressive directional accumulation of deformation due to asymmetric loading in structures. Coffin-Manson plots derived from ratcheting experiments conducted at temperatures over the range, 823-923 K showed anomalous behavior at 873 K and 923 K in the form of dual slope and positive slope respectively, which was attributed to a change in the deformation mechanism during ratcheting in the above temperature domain. This was also reflected in the transition in the fracture mode from fatigue to creep at 873 and 923 K.

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Periodical:

Materials Science Forum (Volumes 830-831)

Pages:

227-230

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.830-831.227

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Online since:

September 2015

Authors:

Aritra Sarkar*, Nagesha Atikukke, R. Sandhya, K. Laha

Keywords:

316LN SS, Dynamic Strain Aging, Mean Stress, Ratcheting, Stress Amplitude

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