DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kang, Byungchul | ko |
dc.contributor.author | Kong, Taeyeong | ko |
dc.contributor.author | Nguyen Huy Dan | ko |
dc.contributor.author | Doan Dinh Phuong | ko |
dc.contributor.author | Ryu, Ho Jin | ko |
dc.contributor.author | Hong, Soon Hyung | ko |
dc.date.accessioned | 2021-09-08T04:50:23Z | - |
dc.date.available | 2021-09-08T04:50:23Z | - |
dc.date.created | 2021-09-08 | - |
dc.date.created | 2021-09-08 | - |
dc.date.issued | 2021-11 | - |
dc.identifier.citation | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v.100 | - |
dc.identifier.issn | 0263-4368 | - |
dc.identifier.uri | http://hdl.handle.net/10203/287646 | - |
dc.description.abstract | The effect of boron (B) addition on the microstructure and mechanical properties of a refractory high-entropy alloy (RHEA) was investigated. The Al0.1CrNbVMo RHEA was doped with 0.015 at.% of B by the powder metallurgical process, and its mechanical properties were compared with undoped RHEA. The microstructures of the undoped and doped RHEAs consisted of a single body-centered cubic matrix phase with homogeneously distributed Al2O3 inclusions. The doped B atoms segregated along grain boundaries and did not form any boride phases. Boron segregation at the grain boundaries was characterized by atom-probe tomography. Compared with the undoped RHEA, the B-doped RHEA showed improved yield strength of 2933 MPa (15% improvement) and ductility of 25.9% (26% improvement). Adding B transformed the fracture surface from intergranular to transgranular due to enhanced grain boundary cohesion induced by B segregation, which resulted in improved ductility. Quantitative analysis was conducted on the undoped and doped alloys to investigate the effect of B on yield strength. The improved yield strength resulting from B doping was attributed to the combined effects of Orowan, dislocation, and B interstitial strengthening. This work demonstrates that B doping of RHEAs is a promising way to overcome their limited room temperature ductility, while maintaining excellent strength. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.title | Effect of boron addition on the microstructure and mechanical properties of refractory Al0.1CrNbVMo high-entropy alloy | - |
dc.type | Article | - |
dc.identifier.wosid | 000687805800002 | - |
dc.identifier.scopusid | 2-s2.0-85111274886 | - |
dc.type.rims | ART | - |
dc.citation.volume | 100 | - |
dc.citation.publicationname | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | - |
dc.identifier.doi | 10.1016/j.ijrmhm.2021.105636 | - |
dc.contributor.localauthor | Ryu, Ho Jin | - |
dc.contributor.localauthor | Hong, Soon Hyung | - |
dc.contributor.nonIdAuthor | Nguyen Huy Dan | - |
dc.contributor.nonIdAuthor | Doan Dinh Phuong | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | High-entropy alloy | - |
dc.subject.keywordAuthor | Refractory high-entropy alloy | - |
dc.subject.keywordAuthor | Powder metallurgy | - |
dc.subject.keywordAuthor | Boron | - |
dc.subject.keywordAuthor | Grain boundary segregation | - |
dc.subject.keywordPlus | STRENGTHENING MECHANISMS | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | PRECIPITATION | - |
dc.subject.keywordPlus | X=0 | - |
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