Formation and Annihilation of Persistent Slip Bands in Fatigued Copper Single Crystals

Acta Metall Sin

2004, Vol. 40

Issue (5): 467-470 DOI:

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Formation and Annihilation of Persistent Slip Bands in Fatigued Copper Single Crystals

ZHU Rong; LI Shouxin; LI Yong;LI Mingyang; CHAO Yuesheng

Shenyang National Laboratory for Materials Science; Institute of Metal Research;The Chinese Academy of Sciences; Shenyang 11001

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ZHU Rong; LI Shouxin; LI Yong; LI Mingyang; CHAO Yuesheng. Formation and Annihilation of Persistent Slip Bands in Fatigued Copper Single Crystals. Acta Metall Sin, 2004, 40(5): 467-470 .

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Abstract In single-slip-oriented copper single crystals which were cyclically deformed under constant plastic shear strain amplitude control, the persistent slip line (PSL) was first formed in the vein dislocation structure of matrix, and then it was rather quickly transformed into persistent slip band (PSB) under consecutive cycling. During annealing for the fatigued copper single crystals with PSBs the penetrating force caused by different void densities drives dislocations motion, makes some parts of PSB thinning and finally PSBs disappeared under the mechanism of annihilation part by part. Because of gradual releasing of the strain energy in annealing process, no recrystallized grain has been observed.

Key words: Cu single crystal persistent slip line (PSL) persistent slip band (PSB)

Received: 18 April 2003

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	ZHU Rong
	LI Shouxin
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	CHAO Yuesheng

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