On the contributions of different micromechanisms for enhancement in the strength of TI-6Al-4V alloy upon B addition: A nanomechanical analysis
- Authors
- Seok, Moo-Young; Zhao, Yakai; Lee, Jung-A; Mohamed, Reda M.; Al-Harbi, Laila M.; Al-Ghamdi, Mohammed S.; Singh, Gaurav; Ramamurty, Upadrasta; Jang, Jae-il
- Issue Date
- Jan-2016
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Ti alloys; Nanoindentation; Strengthening; Hardness; Slip lines
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.649, pp.123 - 127
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 649
- Start Page
- 123
- End Page
- 127
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/24077
- DOI
- 10.1016/j.msea.2015.09.103
- ISSN
- 0921-5093
- Abstract
- The addition of small amount of boron to Ti and it alloys refines the as-cast microstructure and enhances the mechanical properties. In this paper, we employ nanoindentation on each of the constituent phases in the microstructure and 'rule-of-mixture' type analysis to examine their relative contributions to the strength enhancement in a Ti-6Al-4V alloy modified with 0.3 wt% B. Our results indicate to two main contributors to the relatively higher flow strength of B-modified alloy vis-a-vis the base alloy: (a) strengthening of alpha phase due to the reduction in the effective slip length that occurs as a result of the microstructural refinement that occurs upon B addition, and (b) composite strengthening caused by the TiB whiskers present in the alloy.
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