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Microstructure and Texture Evolutions in AISI 1050 Steel by Flow Forming...

by Vikram Bedekar, Praveen Pauskar, Rajiv Shivpuri, Jane Y Howe
Publication Type
Conference Paper
Journal Name
Procedia Engineering
Publication Date
Page Numbers
2355 to 2360
Volume
81
Conference Name
11th International Conference on Technology of Plasticity, ICTP 2014
Conference Location
Nagoya, Japan
Conference Sponsor
Department of Materials Science and Engineering, Nagoya University
Conference Date
-

Hot rolled and annealed AISI 1050 steel cylindrical coupons were flow formed at different levels of deformation (66% and 90% wall thickness reduction). TEM studies revealed development of ultra fine (sub) grain cell structure due to severe plastic deformation. The transverse subgrain size changed from 10m (beginning) to 300nm (66% deformation) to 40nm (90% deformation). EBSD study revealed decreased recrystallization fraction at 90% deformation compared with 66% deformation due to orientation pinning from preferred orientation along {002} planes. No evidence of dislocation pinning or cracking was observed on any samples.
The aim of the present work is to study the deformation behaviour and microstructural evolution during conventional flow forming process. The study also sheds light on the strengthening behaviour and structural changes during severe straining.