TY - GEN
T1 - Study of micro-upsetting by finite element simulation based on crystal plasticity and grain boundary strengthening theories
AU - Zheng, Jun Yuan
AU - Fu, M. W.
N1 - Funding Information:
The authors would like to acknowledge the funding support to this research from The Hong Kong Polytechnic University (No. BBAT), the NSFC key project of No. 51835011, No. 15223520 of GRF.
Publisher Copyright:
© 2021 Trans Tech Publications Ltd, Switzerland.
PY - 2021/8
Y1 - 2021/8
N2 - The properties of individual grains affect the mechanical behaviors and response of materials in micro-scaled deformation, viz., microforming, and there are unknown phenomena and deformation behaviors existing and limiting the wide application of microforming due to size effect. In this paper, a composite model combining crystal plasticity and grain boundary strengthening theories was developed for numerical investigation into the effect of grain boundaries on the plastic deformation of copper micro-upsetting. By comparing the results with and without grain-boundary structure, it is revealed that grain boundaries, which act as the barriers of crystal slip, result in the enhanced flow stress and the discontinuous distribution of stress and strain. The grain size effect is also considered in this research, and the results show the coarse-grained material reduces the flow stress and enhances the inhomogeneous deformation.
AB - The properties of individual grains affect the mechanical behaviors and response of materials in micro-scaled deformation, viz., microforming, and there are unknown phenomena and deformation behaviors existing and limiting the wide application of microforming due to size effect. In this paper, a composite model combining crystal plasticity and grain boundary strengthening theories was developed for numerical investigation into the effect of grain boundaries on the plastic deformation of copper micro-upsetting. By comparing the results with and without grain-boundary structure, it is revealed that grain boundaries, which act as the barriers of crystal slip, result in the enhanced flow stress and the discontinuous distribution of stress and strain. The grain size effect is also considered in this research, and the results show the coarse-grained material reduces the flow stress and enhances the inhomogeneous deformation.
KW - Crystal plasticity
KW - Grain boundary strengthening
KW - Microforming
KW - Size effect
UR - http://www.scopus.com/inward/record.url?scp=85120527071&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.897.21
DO - 10.4028/www.scientific.net/KEM.897.21
M3 - Conference article published in proceeding or book
AN - SCOPUS:85120527071
SN - 9783035718584
T3 - Key Engineering Materials
SP - 21
EP - 28
BT - Material and Manufacturing Technology XII
A2 - Khovaylo, Vladimir
A2 - Wang, Fu Ming
PB - Trans Tech Publications Ltd
T2 - 12th International Conference on Materials and Manufacturing Technologies, ICMMT 2021
Y2 - 23 April 2021 through 26 April 2021
ER -