scholarly journals Effects on hardness and microstructure of AISI 1020 low-carbon steel processed by high-pressure torsion

2017 ◽  
Vol 6 (4) ◽  
pp. 355-360 ◽  
Author(s):  
Diana Maritza Marulanda Cardona ◽  
Jittraporn Wongsa-Ngam ◽  
Hernando Jimenez ◽  
Terence G. Langdon
2014 ◽  
Vol 64 ◽  
pp. 287-293 ◽  
Author(s):  
Yang Liu ◽  
Xiufang Bian ◽  
Kai Zhang ◽  
Chuncheng Yang ◽  
Le Feng ◽  
...  

2012 ◽  
Vol 53 (1) ◽  
pp. 128-132 ◽  
Author(s):  
Hirotaka Kato ◽  
Yoshikazu Todaka ◽  
Minoru Umemoto ◽  
Kazunobu Morisako ◽  
Motonori Hashimoto ◽  
...  

2019 ◽  
Vol 166 ◽  
pp. 168-177 ◽  
Author(s):  
T. Müller ◽  
M.W. Kapp ◽  
A. Bachmaier ◽  
P. Felfer ◽  
R. Pippan

2008 ◽  
Vol 584-586 ◽  
pp. 649-654 ◽  
Author(s):  
Elena G. Astafurova ◽  
Sergey V. Dobatkin ◽  
Evgeny V. Naydenkin ◽  
Svetlana V. Shagalina ◽  
Galina G. Zakharova

Ultrafine grained low carbon steel processed by high pressure torsion (HPT) has been investigated. Depending on initial state (ferritic-pearlitic state after normalization at 950°C, or martensitic ones after quenching from 950°C and 1180°C), the evolution of the microstructure and the mechanical properties was investigated after HPT and annealing at 400-600°C using transmission electron microscopy and X-ray analysis. It has been shown that HPT of martensitic low carbon steel provides a finer structure then that for ferritic-pearlitic initial state, and the initial martensitic morphology and phase composition is strongly dependent on the temperature of quenching. The initial structure was refined by HPT to 95nm in ferritic-pearlitic state and up to 65 and 50 nm in martensitic ones (after quenching from 950°C and 1180°C, respectively). Such ultrafine grained structures demonstrate substantial mechanical properties and possess a high thermal stability up to 500°C in all investigated states. Annealing for 1 h at 500°C results in grain growth up to 860nm for ferritic-pearlitic initial state and 150-450 nm for martensitic ones.


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