Abstract
We carry out molecular dynamics simulations of nanoindentation to investigate the effect of cementite size and temperature on the deformation behavior of nanocomposite pearlite composed of alternating ferrite and cementite layers. We find that, instead of the coherent transmission, dislocation propagates by forming a widespread plastic deformation in cementite layer. We also show that increasing temperature enhances the distribution of plastic strain in the ferrite layer, which reduces the stress acting on the cementite layer. Hence, thickening cementite layer or increasing temperature reduces the likelihood of dislocation propagation through the cementite layer. Our finding sheds a light on the mechanism of dislocation blocking by cementite layer in the pearlite.
| Original language | English |
|---|---|
| Pages (from-to) | 1015-1025 |
| Number of pages | 11 |
| Journal | Current Applied Physics |
| Volume | 16 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2016 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)
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Nanoindentation study of cementite size and temperature effects in nanocomposite pearlite : A molecular dynamics simulation. / Ghaffarian, Hadi; Karimi Taheri, Ali; Ryu, Seunghwa; Kang, Keon Wook.
In: Current Applied Physics, Vol. 16, No. 9, 01.09.2016, p. 1015-1025.Research output: Contribution to journal › Article
TY - JOUR
T1 - Nanoindentation study of cementite size and temperature effects in nanocomposite pearlite
T2 - A molecular dynamics simulation
AU - Ghaffarian, Hadi
AU - Karimi Taheri, Ali
AU - Ryu, Seunghwa
AU - Kang, Keon Wook
PY - 2016/9/1
Y1 - 2016/9/1
N2 - We carry out molecular dynamics simulations of nanoindentation to investigate the effect of cementite size and temperature on the deformation behavior of nanocomposite pearlite composed of alternating ferrite and cementite layers. We find that, instead of the coherent transmission, dislocation propagates by forming a widespread plastic deformation in cementite layer. We also show that increasing temperature enhances the distribution of plastic strain in the ferrite layer, which reduces the stress acting on the cementite layer. Hence, thickening cementite layer or increasing temperature reduces the likelihood of dislocation propagation through the cementite layer. Our finding sheds a light on the mechanism of dislocation blocking by cementite layer in the pearlite.
AB - We carry out molecular dynamics simulations of nanoindentation to investigate the effect of cementite size and temperature on the deformation behavior of nanocomposite pearlite composed of alternating ferrite and cementite layers. We find that, instead of the coherent transmission, dislocation propagates by forming a widespread plastic deformation in cementite layer. We also show that increasing temperature enhances the distribution of plastic strain in the ferrite layer, which reduces the stress acting on the cementite layer. Hence, thickening cementite layer or increasing temperature reduces the likelihood of dislocation propagation through the cementite layer. Our finding sheds a light on the mechanism of dislocation blocking by cementite layer in the pearlite.
UR - http://www.scopus.com/inward/record.url?scp=84973505652&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84973505652&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2016.05.024
DO - 10.1016/j.cap.2016.05.024
M3 - Article
VL - 16
SP - 1015
EP - 1025
JO - Current Applied Physics
JF - Current Applied Physics
SN - 1567-1739
IS - 9
ER -