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Cyclic stress-strain response and surface deformation features of [011] multiple-slip-oriented copper single crystals
Li, XW; Wang, ZG; Li, GY; Wu, SD; Li, SX
Corresponding AuthorLi, XW()
1998-08-10
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume46Issue:13Pages:4497-4505
AbstractCyclic deformation behavior and surface deformation features of [011] multiple-slip-oriented single crystals were investigated at constant plastic shear strain amplitude (gamma(pl)) in the range of 1.1x10(-4)- 7.2 x 10(-3) at room temperature in air. It was revealed that the cyclic deformation characteristic of [011] copper single crystal is quite different from that of [001] and [(1) over bar 11] multiple-slip-oriented copper single crystals. The [011] crystal exhibits a rather low initial hardening rate, which does not increase notably even under higher plastic strain amplitudes. The cyclic stress-strain (CSS) curve of the [011] crystal exhibit a clear plateau region over the range of plastic strain amplitude investigated. Surface observations indicated that the primary persistent slip bands (PSBs) already occur under a lower strain amplitude of 1.1x10(-4), but the operation of secondary slip was strongly suppressed by the corresponding dislocation interactions even at high strain amplitudes. This slip characteristic was suggested to be associated with the occurrence of the plateau region. When gamma(pl)greater than or equal to 2.5 x 10(-3), two types of deformation bands (DBI and DBII) formed on the specimen surface and their habit planes are perpendicular to each other strictly. An analysis based on the classical crystallographic deformation geometry was proposed to interpret the existence of an irreversible rotation of crystal in single crystal subjected to symmetrical push-pull loading. This phenomenon is assumed to be an essential reason for the formation of DBI and DBII. When gamma(pl)greater than or equal to 5.0 x 10(-3) another type of deformation band (DBIII) was observed on the specimen surface and its habit plane is exactly (001) with the maximum shear stress acting on it. The favorable macroscopic state of stress may be responsible for the formation of DBIII, giving rise to the cyclic softening in the cyclically deformed [011] copper single crystals at high strain amplitudes (y(pl) greater than or equal to 5.0 x 10(-3)). (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. Ali rights reserved.
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000075494000004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/108319
Collection中国科学院金属研究所
Corresponding AuthorLi, XW
AffiliationAcad Sinica, Inst Met Res, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Li, XW,Wang, ZG,Li, GY,et al. Cyclic stress-strain response and surface deformation features of [011] multiple-slip-oriented copper single crystals[J]. ACTA MATERIALIA,1998,46(13):4497-4505.
APA Li, XW,Wang, ZG,Li, GY,Wu, SD,&Li, SX.(1998).Cyclic stress-strain response and surface deformation features of [011] multiple-slip-oriented copper single crystals.ACTA MATERIALIA,46(13),4497-4505.
MLA Li, XW,et al."Cyclic stress-strain response and surface deformation features of [011] multiple-slip-oriented copper single crystals".ACTA MATERIALIA 46.13(1998):4497-4505.
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