Outstanding improvement in the CSL distribution in interstitial free (IF) steel via strain annealing route

Rath, Debasis; Setia, Prince; Tripathi, Nikhil; Shekhar, Shashank

doi:10.1016/j.matchar.2022.111817

Cited by 8 publications

(1 citation statement)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, strain annealing involves a longer annealing time at a lower temperature to initiate the phenomenon known as strain-induced boundary migration (SIBM). Until now, uniaxial tension/compression and cold rolling are the pre-deformation techniques typically employed to introduce stored energy into the material to provide the driving force for optimizing GBCD during the annealing process [ 22 , 23 , 24 ]. Nevertheless, conventional TMP finds fabricating complex hollow components or customized parts with near-net shapes challenging.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Grain Boundary Character Distribution in B10 Alloy from Friction Stir Processing to Annealing Treatment

Feng,

Zhou,

Wang

et al. 2024

Materials

View full text Add to dashboard Cite

In this study, the grain boundary character distribution (GBCD) of a B10 alloy was optimized, employing thermomechanical processing consisting of friction stirring processing (FSP) and annealing treatment. Using electron backscatter diffraction, the effects of rotational speed of FSP and annealing time on the evolution of GBCD were systematically investigated. The GBCD evolution was analyzed concerning various parameters, such as the fraction of low-Σ coincidence site lattice (CSL) boundaries, the average number of grains per twin-related domain (TRD), the length of longest chain (LLC), and the triple junction distribution. The experimental results revealed that the processing of a 1400 rpm rotational speed of FSP followed by annealing at 750 °C for 60 min resulted in the optimum grain boundary engineering (GBE) microstructure with the highest fraction of low-Σ CSL boundaries being 82.50% and a significantly fragmented random boundary network, as corroborated by the highest average number of grains per TRD (14.73) with the maximum LLC (2.14) as well as the highest J2/(1 − J3) value (12.76%). As the rotational speed of FSP increased from 600 rpm to 1400 rpm, the fraction of low-Σ CSL boundaries monotonously increased. The fraction of low-Σ CSL boundaries first increased and then decreased with an increase in annealing time. The key to achieving GBE lies in inhibiting the recrystallization phenomenon while stimulating abundant multiple twinning events through strain-induced boundary migration.

show abstract

Section: Introductionmentioning

confidence: 99%