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IMMC

Fengxiang Lin
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Funding: FNRS
Supervisor(s): Laurent Delannay

This project aims at advancing the current understanding of the evolution of microstructures and strength during plastic deformation of face centered cubic metals in which fine-scale twins influence the dislocation slip activity, the stored energy, and the subsequent annealing. The fine-scale twins can be mechanical twins (e.g. in TWIP steels and high-strain-rate deformed copper) or growth twins in electro-deposited films. These fine-scale twins increase anisotropy, which promotes microscopic shear banding during plastic deformation. This project will specifically address some fundamental questions:
- What is the influence of the interplay of dislocation slip and mechanical twinning on the occurrence of microscopic shear bands (MSBs)?
- What is the influence of MSBs on the deformed microstructure (incl. rotation of twin bundles), the internal stresses, and the stored dislocation density?
- How do hardening and internal stresses (incl. “back-stresses”) develop in small-size samples compared to bulk samples?
- How do structural heterogeneities from MSBs and twin bundles affect the subsequent annealing behavior?

IMMC main research direction(s):
Processing and characterisation of materials
Solid mechanics

Research group(s): MEMA

    

Recent publications

See complete list of publications

Journal Articles


1. Lin, Fengxiang; Shi, Qiwei; Delannay, Laurent. Microscopic heterogeneity of plastic strain and lattice rotation in partially recrystallized copper polycrystals. In: International Journal of Solids and Structures, Vol. 184, p. 167-177 (2020). doi:10.1016/j.ijsolstr.2019.01.024. http://hdl.handle.net/2078.1/213885

2. Huang, Meng; Xu, Chao; Fan, Guohua; Maawad, Emad; Gan, Weimin; Geng, Lin; Lin, Fengxiang; Tang, Guangze; Wu, Hao; Du, Yan; Li, Danyang; Miao, Kesong; Zhang, Tongtong; Yang, Xuesong; Xia, Yiping; Cao, Guojian; Kang, Huijun; Wang, Tongmin; Xiao, Tiqiao; Xie, Honglan. Role of layered structure in ductility improvement of layered Ti-Al metal composite. In: Acta Materialia, Vol. 153, no.153, p. 235-249 (2018). doi:10.1016/j.actamat.2018.05.005. http://hdl.handle.net/2078.1/198272

3. Liu, H.; Lin, Fengxiang; Zhao, P.; Moelans, N.; Wang, Y.; Nie, J.F. Formation and autocatalytic nucleation of co-zone {101¯2} deformation twins in polycrystalline Mg: A phase field simulation study. In: Acta Materialia, Vol. 153, no.153, p. 86-107 (2018). doi:10.1016/j.actamat.2018.04.043. http://hdl.handle.net/2078.1/197774

4. Lin, Fengxiang; Zhang, Yubin; Pantleon, Wolfgang; Juul Jensen, Dorte. Importance of Non-uniform Boundary Migration for Recrystallization Kinetics. In: Metallurgical and Materials Transactions A, Vol. 49, no.11, p. 5246-5258 (2018). doi:10.1007/s11661-018-4846-2. http://hdl.handle.net/2078.1/203904

5. Lin, Fengxiang; Marteleur, Matthieu; Jacques, Pascal; Delannay, Laurent. Transmission of {332}<113> twins across grain boundaries in a metastable beta-titanium alloy. In: International Journal of Plasticity, Vol. 105, p. 195-210 (2018). doi:10.1016/j.ijplas.2018.02.012. http://hdl.handle.net/2078.1/194357

6. Lin, Fengxiang; Marteleur, Matthieu; Alkorta, Jon; Jacques, Pascal; Delannay, Laurent. Local stress field induced by twinning in a metastable beta-titanium alloy. In: IOP Conference Series: Materials Science and Engineering, Vol. 219, p. 012031 (2017). doi:10.1088/1757-899X/219/1/012031. http://hdl.handle.net/2078.1/188529