Is there an effect of dynamic strain aging on dislocation evolution?

Autor:	Xuekun Shang, Xiuxing Peng, Zhiyuan Liang, Binbin He
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	Dynamic strain aging transmission electron microscopy twinning-induced plasticity steel dislocation nanoindentation Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 12, Iss 10, Pp 719-726 (2024)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2024.2380101
Popis:	Herein, we explore the effect of dynamic strain aging (DSA) on dislocation evolution using nanoindentation and transmission electron microscopy (TEM). DSA is primarily manifested as serrations on the load-displacement curves at lower strain rates (10−2 and 10−3 s−1), whereas these serrations are substantially less at higher strain rate (10−1 and 100 s−1). Interestingly, despite variations in strain rates and DSA occurrence, detailed TEM observations beneath the indentations reveal no discernible differences in dislocation density and substructure. The present study indicates that although DSA can increase the gliding resistance of dislocations, it does not affect the evolution of dislocation.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/6137ec35cb404c41b64281a43a6ccd0d Zobrazit plný text záznamu View record in DOAJ