Atomistic simulations of nanoindentation response of irradiation defects in Iron
Radiation response of a material is a consequence of defects’ evolution in any radiation damage event. The radiation-induced defects can significantly alter the mechanical properties of a material. Radiation damage initiates from incident neutron by bombardment on solid material causing production a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2019
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| Online Access: | http://journalarticle.ukm.my/14357/ http://journalarticle.ukm.my/14357/1/24%20M.%20Mustafa%20Azeem.pdf |
| _version_ | 1848813531317665792 |
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| author | M. Mustafa Azeem, Wang, Qingyu Muhammad Zubair, |
| author_facet | M. Mustafa Azeem, Wang, Qingyu Muhammad Zubair, |
| author_sort | M. Mustafa Azeem, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Radiation response of a material is a consequence of defects’ evolution in any radiation damage event. The radiation-induced defects can significantly alter the mechanical properties of a material. Radiation damage initiates from incident neutron by bombardment on solid material causing production and evolution of Frenkel defects. Since voids are formed due to aggregation of a large number of vacancies that cause dimensional changes and hence irradiation-induced swelling. In order to characterize the effect of irradiation defects, we have performed molecular dynamics (MD) simulations to investigate nanoindentation response of point defects and voids in Fe and their effects on mechanical parameters. The radial effect of voids and their interaction mechanism is also explored by nanoindentation simulation. It has been found that most of the dislocation produced are <111> and <100> during nanoindentation in all simulated models. There will be an increase in dislocation density which will harden the material and reduce its toughness. The mechanical parameters such as hardness H and reduced elastic modulus Er of irradiation defects are calculated from P-h curves. It is found that both H & Er of the point defects and voids are lower than the perfect model. |
| first_indexed | 2025-11-15T00:19:40Z |
| format | Article |
| id | oai:generic.eprints.org:14357 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:19:40Z |
| publishDate | 2019 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:143572020-03-03T08:09:41Z http://journalarticle.ukm.my/14357/ Atomistic simulations of nanoindentation response of irradiation defects in Iron M. Mustafa Azeem, Wang, Qingyu Muhammad Zubair, Radiation response of a material is a consequence of defects’ evolution in any radiation damage event. The radiation-induced defects can significantly alter the mechanical properties of a material. Radiation damage initiates from incident neutron by bombardment on solid material causing production and evolution of Frenkel defects. Since voids are formed due to aggregation of a large number of vacancies that cause dimensional changes and hence irradiation-induced swelling. In order to characterize the effect of irradiation defects, we have performed molecular dynamics (MD) simulations to investigate nanoindentation response of point defects and voids in Fe and their effects on mechanical parameters. The radial effect of voids and their interaction mechanism is also explored by nanoindentation simulation. It has been found that most of the dislocation produced are <111> and <100> during nanoindentation in all simulated models. There will be an increase in dislocation density which will harden the material and reduce its toughness. The mechanical parameters such as hardness H and reduced elastic modulus Er of irradiation defects are calculated from P-h curves. It is found that both H & Er of the point defects and voids are lower than the perfect model. Penerbit Universiti Kebangsaan Malaysia 2019-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/14357/1/24%20M.%20Mustafa%20Azeem.pdf M. Mustafa Azeem, and Wang, Qingyu and Muhammad Zubair, (2019) Atomistic simulations of nanoindentation response of irradiation defects in Iron. Sains Malaysiana, 48 (9). pp. 2029-2039. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid48bil9_2019/KandunganJilid48Bil9_2019.html |
| spellingShingle | M. Mustafa Azeem, Wang, Qingyu Muhammad Zubair, Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title | Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title_full | Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title_fullStr | Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title_full_unstemmed | Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title_short | Atomistic simulations of nanoindentation response of irradiation defects in Iron |
| title_sort | atomistic simulations of nanoindentation response of irradiation defects in iron |
| url | http://journalarticle.ukm.my/14357/ http://journalarticle.ukm.my/14357/ http://journalarticle.ukm.my/14357/1/24%20M.%20Mustafa%20Azeem.pdf |