Texture homogeneity and stability in severely warm-rolled and annealed ultrafine pearlite

ABSTRACT

The evolution of microstructure and texture was investigated in a severely warm-rolled ultrafine pearlitic steel. The steel was 95% warm-rolled at 600°C and annealed at 700°C for different time intervals. The spheroidisation of cementite initiated after 30% reduction and completed beyond 70% reduction. The 95% warm-rolled steel showed elongated as well as ultrafine equiaxed ferrite grains. Texture inhomogeneities were evidenced by the presence of Goss component ({011} <100>) on the surface originating due to surface shear and diffuse texture at the interior. Formation of equiaxed microstructure after annealing through continuous recrystallisation resulted in the retention of the surface Goss component. However, the Goss component was destroyed beyond annealing for 180 minutes due to the abnormal growth of other grains.

KEYWORDS:

• Pearlite
• severe plastic deformation
• warm-rolling
• annealing
• microstructure
• texture

Data availability statement

The data that support the findings of this study are available on request from the corresponding author, PPB. The data are not publicly available as they also form part of an ongoing study.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors would like to acknowledge the financial support of DST-SERB, India [grant number EMR/2016/002215] and the DST-FIST program [grant number SR/FST/ETI-421/2016].