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- Zhu, ZhenyuChengdu Univ, Peoples R China (författare)
Origin of prestrain-induced cyclic-strain hardening: Multi-scale experimental characterizations and simulations of 7075 aluminum alloy
- Artikel/kapitelEngelska2024
Förlag, utgivningsår, omfång ...
- ELSEVIER SCI LTD,2024
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Nummerbeteckningar
- LIBRIS-ID:oai:DiVA.org:liu-201850
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-201850URI
- https://doi.org/10.1016/j.matdes.2024.112711DOI
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- Språk:engelska
- Sammanfattning på:engelska
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- Funding Agencies|The 2023 Open Project of Failure Mechanics and Engineering Disaster Prevention, Key Lab of Sichuan Province [FMEDP202303]; Technology Development Project Foundation of Petro-China Southwest Oil and Gas Field CDB Operating Company; National Natural Science Foundation of China [2023NSFSC0916]; Sichuan Science and Technology Program [20220303-16]; [52205182]
- The influence of prefabricated dislocation features induced by rate dependent prestrain on the post-cyclic process in 7075 aluminum alloy exhibits significant variations, which are of great importance in terms of concerns, designs, and discoveries. Considering strain rate dependent prestrain provides diversified hardening stimuli for the subsequent cyclic process. The maximum cyclic stress in the post-cyclic stage was maintained at the same level as the prestress with strain rates ranging from 10-4s-1 to 10-1s-1. Subsequently, by adjusting post-cycling stress amplitude, research was conducted on quasi-plastic amplitude cycle (QPC) and low plasticity amplitude cycle (LPC) loading conditions. Through experimental mechanism analysis, as well as verification through molecular dynamics and crystal plasticity simulations, prestrain induced by rapid strain rates enhanced the hardening during QPC, stemming from the effects of matrix reconstruction strengthening and wavy structured grain boundaries. However, prestrain induced by slow strain rates promoted the hardening during LPC, primarily arising from the non-uniform crystal structures within individual grains, which was achieved through the complex sub-crystal clusters at grain boundaries, along with intracrystal orderly slipping lattice. These findings offer new insights for the optimization of microstructural design through dislocation engineering.
Ämnesord och genrebeteckningar
- TEKNIK OCH TEKNOLOGIER Materialteknik Annan materialteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Materials Engineering Other Materials Engineering hsv//eng
- 7075 aluminum alloy; Cyclic stability; Rate dependent prestrain; Crystal plasticity; Molecular dynamics
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Chai, GuocaiLinköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Chengdu Univ, Peoples R China(Swepub:liu)guoch17 (författare)
- Zhang, JunliangPetroChina Southwest Oil & Gas Field CDB Operating, Peoples R China (författare)
- Li, XiaotaoChengdu Univ, Peoples R China (författare)
- Huang, YanyanChengdu Univ, Peoples R China (författare)
- Zhang, JieSouthwest Jiaotong Univ, Peoples R China (författare)
- Yu, ChaoSouthwest Jiaotong Univ, Peoples R China (författare)
- Wang, QingyuanChengdu Univ, Peoples R China (författare)
- Chengdu Univ, Peoples R ChinaKonstruktionsmaterial (creator_code:org_t)
Sammanhörande titlar
- Ingår i:Materials & design: ELSEVIER SCI LTD2380264-12751873-4197
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