Search

Your search keyword '"Zhao, X.J."' showing total 163 results
Start Over Author "Zhao, X.J." Publisher elsevier b.v.
163 results on '"Zhao, X.J."'

32. Active {11[formula omitted]1} and {10[formula omitted]2} extension twinning in a WE43 Mg alloy.

Author

Chen, W.Q., Deng, S., Zhao, X.J., and Luo, S.N.

Subjects
TWIN boundaries, ALLOYS
Abstract

• The interaction of co-zone {11 2 ¯ 1} twin variants can result in formation of crossing-like twin-twin junctions, different from those formed by interaction of co-zone {10 1 ¯ 2} twin variants. • Four typical twin-twin junctions are observed for the interaction of the {11 2 ¯ 1} twins, including two types of crossing-like junctions. One type of the crossing-like junction is formed by nucleation of a new twin on the back side of the impeded twin, and the other type may be formed by the pre-existing twin simultaneously impeding two closely aligned incoming twins on its two sides. • Twin nucleation is more likely to occur at {11 2 ¯ 1} twin boundary rather than at {10 1 ¯ 2} twin boundary, due to the relatively large strain concentration at the {11 2 ¯ 1} twin boundary. Deformation twinning in a WE43 alloy subjected to uniaxial compression at room temperature is investigated. Active {11 2 ¯ 1} and {10 1 ¯ 2} extension twinning is observed. The activation of {11 2 ¯ 1} twinning in a certain grain is influenced not only by its own Schmid factor, but also by that of the basal slip. Twin-twin interactions of the co-zone {11 2 ¯ 1} twin variants are commonly observed and systematically studied, including the crystallographic characteristics of the four typically observed twin-twin junctions (TTJs) and the associated twin-twin boundaries. Unlike the quilted-looking TTJs formed by the interaction of co-zone {10 1 ¯ 2} twin variants, crossing-like TTJs of co-zone {11 2 ¯ 1} twin variants are observed and their formation mechanisms are discussed. Crossing-like TTJs are also formed by the interaction of {11 2 ¯ 1} and {10 1 ¯ 2} twins. The morphology and thickening rate of {11 2 ¯ 1} and {10 1 ¯ 2} twins vary markedly due to the difference in twinning shear. The needle-like {11 2 ¯ 1} twins thicken more slowly than the lenticular {10 1 ¯ 2} twins. Twin nucleation is observed on the previously formed {11 2 ¯ 1} twin boundary due to the relatively large strain concentration on such interface, while twin nucleation on {10 1 ¯ 2} twin boundary is rarely observed. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

39. Dynamic mechanical properties, deformation and damage mechanisms of eutectic high-entropy alloy AlCoCrFeNi2.1 under plate impact.

Author

Zhao, S.P., Feng, Z.D., Li, L.X., Zhao, X.J., Lu, L., Chen, S., Zhang, N.B., Cai, Y., and Luo, S.N.

Subjects
EUTECTIC alloys, DEFORMATIONS (Mechanics), BRITTLE fractures, TRANSMISSION electron microscopy, DUCTILE fractures, EQUATIONS of state
Abstract

• Both L1 2 and B 2 phases remain ordered at 12 GPa. • The accurate hugoniot equation of state of AlCoCrFeNi 2.1 is obtained. • Nanotwins are observed in L1 2 phase. • Both ductile and brittle fracture modes are observed. Shock compression and spallation of a eutectic high-entropy alloy (HEA) AlCoCrFeNi 2. 1 with lamellar structure are investigated via plate impact loading with free-surface velocity measurements. The as-cast and postmortem samples are characterized with transmission electron microscopy, electron back-scatter diffraction and scanning electron microscopy. An accurate Hugoniot equation of state is determined. After shock compression to ∼ 12 GPa, both the L1 2 and B 2 phases retain their ordered structures. Dense dislocations in the {111} slip planes, stacking faults and deformation twins are found in the L1 2 phase, along with fewer dislocations in the {110} slip bands in the B 2 phase. Shock-induced deformation twinning within the L1 2 phase of this HEA is observed as a new deformation mechanism under various loading conditions. For spallation, both ductile and brittle damage modes are observed. The micro voids and cracks prefer to nucleate at the phase boundaries chiefly, then in the B 2 phase. Under similar shock stress, the spall strength of AlCoCrFeNi 2. 1 HEA is about 40% higher than those of other reported dual-phase HEAs due to the high stability of its semi-coherent phase boundaries. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

41. Shock compression and spallation damage of high-entropy alloy Al0.1CoCrFeNi.

Author

Zhang, N.B., Xu, J., Feng, Z.D., Sun, Y.F., Huang, J.Y., Zhao, X.J., Yao, X.H., Chen, S., Lu, L., and Luo, S.N.

Subjects
TRANSMISSION electron microscopy, STRAIN rate, ALLOYS, IMPACT strength, EQUATIONS of state
Abstract

• The accurate Hugoniot equation of state of Al 0.1 CoCrFeNi. • Nanotwins are only observed at high shock stress. • Damage in the Al 0.1 CoCrFeNi is ductile in nature. • Void nucleation depends on GB misorientation and peak stress. Shock compression and spallation damage of a face-center cubic phase high-entropy alloy (HEA) Al 0.1 CoCrFeNi were investigated via plate impact experiments along with free surface velocity measurements. Postmortem samples were characterized with transmission electron microscopy and electron backscatter diffraction. The Hugoniot equation of state and spall strength at different impact strengths were determined. There exists a power-law relation between spall strength and strain rate. The spall strength of Al 0.1 CoCrFeNi HEA is about 50% higher than those of previously studied HEAs and comparable to those widely applied structural stainless steels at the same shock stress. Dislocation glide and stacking faults are the important deformation mechanisms in the Al 0.1 CoCrFeNi HEA. Nanotwins are only observed at high shock stress. Damage in the Al 0.1 CoCrFeNi HEA is ductile in nature. Voids are nucleated preferentially in grain interiors, and the intragranular voids show a strong dependence on grain boundary misorientation and peak stress. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

46. BESII detector simulation

Author

Ablikim, M., Bai, J.Z., Ban, Y., Bian, J.G., Cai, X., Chang, J.F., Chen, H.F., Chen, H.S., Chen, H.X., Chen, J.C., Chen, Jin, Chen, Jun, Chen, M.L., Chen, Y.B., Cheng, B.S., Chi, S.P., Chu, Y.P., Cui, X.Z., Dai, H.L., Dai, Y.S., Deng, Z.Y., Dong, L.Y., Dong, Q.F., Du, S.X., Du, Z.Z., Fang, J., Fang, S.S., Fu, C.D., Fu, H.Y., Gao, C.S., Gao, Y.N., Gong, M.Y., Gong, W.X., Gu, S.D., Guo, Y.N., Guo, Y.Q., Guo, Z.J., Harris, F.A., He, K.L., He, M., He, X., Heng, Y.K., Hu, H.M., Hu, T., Huang, G.S., Huang, X.P., Huang, X.T., Ji, X.B., Jiang, C.H., Jiang, X.S., Jin, D.P., Jin, S., Jin, Y., Jin, Yi, Lai, Y.F., Li, C.G., Li, F., Li, G., Li, H.H., Li, J., Li, J.C., Li, Q.J., Li, R.Y., Li, S.M., Li, W.D., Li, W.G., Li, X.L., Li, X.Q., Li, Y.L., Liang, Y.F., Liao, H.B., Liu, C.X., Liu, F., Liu, Fang, Liu, H.H., Liu, H.M., Liu, J., Liu, J.B., Liu, J.P., Liu, R.G., Liu, Z.A., Liu, Z.X., Lu, F., Lu, G.R., Lu, H.J., Lu, J.G., Luo, C.L., Luo, L.X., Luo, X.L., Ma, F.C., Ma, H.L., Ma, J.M., Ma, L.L., Ma, Q.M., Ma, X.B., Ma, X.Y., Mao, Z.P., Mo, X.H., Nie, J., Nie, Z.D., Olsen, S.L., Peng, H.P., Qi, N.D., Qian, C.D., Qin, H., Qiu, J.F., Ren, Z.Y., Rong, G., Shan, L.Y., Shang, L., Shen, D.L., Shen, X.Y., Sheng, H.Y., Shi, F., Shi, X., Sun, H.S., Sun, J.F., Sun, S.S., Sun, Y.Z., Sun, Z.J., Tang, X., Tao, N., Tian, Y.R., Tong, G.L., Varner, G.S., Wang, D.Y., Wang, J.Z., Wang, K., Wang, L., Wang, L.S., Wang, M., Wang, P., Wang, P.L., Wang, S.Z., Wang, W.F., Wang, Y.F., Wang, Z., Wang, Z.Y., Wang, Zhe, Wang, Zheng, Wei, C.L., Wei, D.H., Wu, N., Wu, Y.M., Xia, X.M., Xie, X.X., Xin, B., Xu, G.F., Xu, H., Xue, S.T., Yan, M.L., Yang, F., Yang, H.X., Yang, J., Yang, Y.X., Ye, M., Ye, M.H., Ye, Y.X., Yi, L.H., Yi, Z.Y., Yu, C.S., Yu, G.W., Yuan, C.Z., Yuan, J.M., Yuan, Y., Zang, S.L., Zeng, Y., Zeng, Yu, Zhang, B.X., Zhang, B.Y., Zhang, C.C., Zhang, D.H., Zhang, H.Y., Zhang, J., Zhang, J.W., Zhang, J.Y., Zhang, Q.J., Zhang, S.Q., Zhang, X.M., Zhang, X.Y., Zhang, Y.Y., Zhang, Yiyun, Zhang, Z.P., Zhang, Z.Q., Zhao, D.X., Zhao, J.B., Zhao, J.W., Zhao, M.G., Zhao, P.P., Zhao, W.R., Zhao, X.J., Zhao, Y.B., Zhao, Z.G., Zheng, H.Q., Zheng, J.P., Zheng, L.S., Zheng, Z.P., Zhong, X.C., Zhou, B.Q., Zhou, G.M., Zhou, L., Zhou, N.F., Zhu, K.J., Zhu, Q.M., Zhu, Y.C., Zhu, Y.S., Zhu, Yingchun, Zhu, Z.A., Zhuang, B.A., Zhuang, X.A., and Zou, B.S.

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results