J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (2): 257-264.DOI: 10.1016/j.jmst.2017.11.018
• Orginal Article • Previous Articles Next Articles
Min Zhaab, Hong-Min Zhangb, Zhi-Yuan Yub, Xuan-He Zhangb, Xiang-Tao Mengb, Hui-Yuan Wangab(), Qi-Chuan Jiangab
Received:
2017-06-20
Revised:
2017-08-26
Accepted:
2017-08-31
Online:
2018-02-10
Published:
2018-02-10
Min Zha, Hong-Min Zhang, Zhi-Yuan Yu, Xuan-He Zhang, Xiang-Tao Meng, Hui-Yuan Wang, Qi-Chuan Jiang. Bimodal microstructure - A feasible strategy for high-strength and ductile metallic materials[J]. J. Mater. Sci. Technol., 2018, 34(2): 257-264.
Fig. 1. Strength-ductility data taken from literature for bimodal Cu and its alloys. Data for NS/UFG and CG Cu and its alloys are also included for comparison [1,5,19,28-31].
Fig. 2. (a) Lower and (b) higher magnification ASTAR-TEM orientation images together with corresponding grain size distributions of the 6P Al-7 Mg sample, where narrow gray and coarse black lines depict low (5° < θ < 15°) and high (15° < θ < 180°) angle grain boundaries, respectively; inset in (b) is the color code for the orientation maps. (c and d) statistic grain size distributions in number fraction and area fraction, respectively [12].
Fig. 3. Strength-ductility data taken from the literature for bimodal Al-Mg alloys. Data for NS/UFG and CG Al alloys are also included for comparison [11,12,14,18,20,35,36].
Fig. 4. Strength-ductility data taken from the literature for bimodal/multimodal Ti and its alloys. Data for UFG and CG Ti and its alloys are also included for comparison [2,42-44].
Fig. 5. Strength-ductility data taken from the literature for multimodal Zr. Data for UFG and CG Zr and its alloys are also included for comparison [39,40,45].
Fig. 6. Strength-ductility data taken from the literature for bimodal/multimodal steels. Data for UFG and CG steels are also included for comparison [48-50,52-54].
Fig. 7. (a-d) Typical FESEM-OIM maps taken in the RD-TD plane of the HPRed AZ91 sheet, where gray and black lines depict low (2° θ < 15°) and high (15° < θ < 90°) angle grain boundaries, respectively, thereinto, (c) coarse-grained component and (d) fine-grained component; inset in (a) is the color code for the orientation maps.
Fig. 8. (a) Stress-strain curves of HPRed AZ91 sheet; (b) tensile strength vs total tensile elongation of AZ91 alloys in comparison with available literature data [58].
Fig. 9. Strength-ductility data taken from the literature for bimodal/multimodal pure Ni. Data for NS/UFG and CG pure Ni are also included for comparison [9,21,66-69].
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