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Titolo:
Cyclic deformation behaviour and fatigue crack propagation in AZ91HP and AM50HP
Autore:
Liu, Z; Wang, ZG; Wang, Y; Chen, LH; Zhao, HJ; Klein, F;
Indirizzi:
Acad Sinica, Inst Met Res, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China Acad Sinica Shenyang Peoples R China 110015 yang 110015, Peoples R China Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110023, Peoples R China Shenyang Univ Technol Shenyang Peoples R China 110023 3, Peoples R China Aalen Univ, Res Ctr Cast Met, D-73430 Aalen, Germany Aalen Univ Aalen Germany D-73430 es Ctr Cast Met, D-73430 Aalen, Germany
Titolo Testata:
MATERIALS SCIENCE AND TECHNOLOGY
fascicolo: 3, volume: 17, anno: 2001,
pagine: 264 - 268
SICI:
0267-0836(200103)17:3<264:CDBAFC>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNESIUM ALLOY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Liu, Z Acad Sinica, Inst Met Res, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China Acad Sinica Shenyang Peoples R China 110015 0015, Peoples R China
Citazione:
Z. Liu et al., "Cyclic deformation behaviour and fatigue crack propagation in AZ91HP and AM50HP", MATER SCI T, 17(3), 2001, pp. 264-268

Abstract

The purpose of the present work was to investigate room temperature cyclicdeformation and crack propagation behaviour in the most widely used die casting magnesium alloy AZ91HP with different heat treatments. In addition, examination of the low cycle fatigue properties of solid solution treated alloy AZ91HP-T4 was emphasised in comparison with AM50HP. Obvious cyclic strain hardening was found in low cycle fatigue tests, especially for AZ91HP-T4at high cyclic strain amplitudes. Nevertheless, it was very difficult to evaluate differences in low cycle fatigue behaviour between die casting alloy AZ91HP-F, artificially aged alloy AZ91HP-T6, solution treated alloy AZ91HP-T4, and AM50HP(-F) because of the scatter of test data. However, it may be concluded that the last two alloys had greater plastic strain components during cyclic deformation, and AZ91HP-T4 exhibited a longer fatigue life than that of AM50HP at the highest strain amplitude. According to results of tests carried out on AZ91HP compact tension (CT) specimens, it was concluded that solution treatment could reduce the fatigue crack propagation rate, and plasticity induced crack closure was considered to have a predominant effect on fatigue crack propagation.

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Documento generato il 14/07/20 alle ore 09:13:50