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2017 Vol.27, Issue 12 Preview Page
Strain Gradient Crystal Plasticity Finite Element Modeling for the Compression Behaviors of Single Crystals

단결정 압축 변형 거동의 변형구배 결정소성 유한요소해석

Jae-Ho Jung1
,
Kyung-Mox Cho2
,
Yoon Suk Choi2†
정 재호1
,
조 경목2
,
최 윤석2†
1HYUNJIN Materials Co., Busan 46755, Republic of Korea
2School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
1현진소재㈜
2부산대학교 공과대학 재료공학부
†Corresponding author : choiys@pusan.ac.kr (Y. S. Choi, Pusan Nat’l. Univ.)
December 2017. pp. 679-687
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Abstract

A strain-gradient crystal plasticity finite element method(SGCP-FEM) was utilized to simulate the compressive deformation behaviors of single-slip, (111)[101], oriented FCC single-crystal micro-pillars with two different slip-plane inclination angles, 36.3° and 48.7°, and the simulation results were compared with those from conventional crystal plasticity finite element method(CP-FEM) simulations. For the low slip-plane inclination angle, a macroscopic diagonal shear band formed along the primary slip direction in both the CP- and SGCP-FEM simulations. However, this shear deformation was limited in the SGCP-FEM, mainly due to the increased slip resistance caused by local strain gradients, which also resulted in strain hardening in the simulated flow curves. The development of a secondly active slip system was altered in the SGCP-FEM, compared to the CP-FEM, for the low slip-plane inclination angle. The shear deformation controlled by the SGCP-FEM reduced the overall crystal rotation of the micro-pillar and limited the evolution of the primary slip system, even at 10% compression.

Keywords
strain gradient
crystal plasticity
slip
single crystal
finite element method
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 27
  • No :12
  • Pages :679-687
  • Received Date : 2017-09-11
  • Revised Date : 2017-11-01
  • Accepted Date : 2017-11-06
  • DOI :https://doi.org/10.3740/MRSK.2017.27.12.679
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