Shuffle and glide mechanisms of prismatic dislocations in a hexagonal C14-type Laves-phase intermetallic compound

doi:10.1103/PhysRevB.102.134117

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	Shuffle and glide mechanisms of prismatic dislocations in a hexagonal C14-type Laves-phase intermetallic compound
	Zhang, Yongchao; Zhang, Wei; Du, Beining; Li, Wenqing; Sheng, Liyuan; Ye, Hengqiang; Du, Kui
	2020-10-26
Source Publication	PHYSICAL REVIEW B
Volume	102 Issue:13
Abstract	Complex structured intermetallic compounds often show brittleness at ambient temperature or under high strain rate deformation, but ductility at elevated temperature or low strain rate deformation. The change of dislocation behavior plays a decisive role in the brittle-to-ductile transition. Here, dislocations are studied in a hexagonal structured Laves-phase intermetallic compound with aberration-corrected scanning transmission electron microscopy after quasistatic compression at high temperature or high-speed impact at room temperature. Different slip mechanisms are resolved for the prismatic dislocations. Under the high-temperature compression, a shuffle mechanism assisted by diffusion mediates the dislocation motion to form planar defects strictly following the topologically close-packing rules. In contrast, under the high-speed room-temperature impact, the prismatic dislocations prefer to glide on undulated planes that comprise small facets with high atom density.
DOI	10.1103/PhysRevB.102.134117
WOS ID	WOS:000582413300001
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/82418
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Zhang, Yongchao,Zhang, Wei,Du, Beining,et al. Shuffle and glide mechanisms of prismatic dislocations in a hexagonal C14-type Laves-phase intermetallic compound[J]. PHYSICAL REVIEW B,2020,102(13).
APA	Zhang, Yongchao.,Zhang, Wei.,Du, Beining.,Li, Wenqing.,Sheng, Liyuan.,...&Du, Kui.(2020).Shuffle and glide mechanisms of prismatic dislocations in a hexagonal C14-type Laves-phase intermetallic compound.PHYSICAL REVIEW B,102(13).
MLA	Zhang, Yongchao,et al."Shuffle and glide mechanisms of prismatic dislocations in a hexagonal C14-type Laves-phase intermetallic compound".PHYSICAL REVIEW B 102.13(2020).

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