Tata Steel Limited

Rudra Bubai Sarkar

Suman Guha

Rahul Kumar Verma

Shaik Shamshoddin

Gujre Vinay Sanjay

The present disclosure discloses a method for improving yield strength of one or more workpieces. The method includes positioning the one or more workpieces in a punch and die assembly and operating the punch and die assembly such that, a plurality of surface protrusions are formed on the one or more workpieces. The plurality of surface protrusions are formed by plastic deformation on the one or more workpieces, to improve yield strength of the one or more workpieces. The present disclosure also provides an apparatus to improve yield strength of the one or more workpieces. The present disclosure is configured to improve yield strength of the one or more workpieces, without altering its mechanical characteristics.

Method for improving yield strength of a workpiece, an apparatus and a workpiece thereof

The present disclosure discloses a method for improving fatigue strength of a workpiece (). The method comprises positioning the workpiece () in a punch and die assembly (). Operating the punch and die assembly () one or more times to imprint surface features () on a portion of a surface of the workpiece (), wherein the surface features () induces compressive residual stresses at a sub-surface level of the workpiece (), and improves the fatigue strength of the workpiece ().

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Jamshedpur, India

Rudra Bubai Sarkar