Tensile Behabior of nanocrystalline Ni-Fe alloy
- Title
- Tensile Behabior of nanocrystalline Ni-Fe alloy
- Author
- 이재성
- Keywords
- Nanocrystalline material; Alloy (Ni–Fe); Tensile deformation and fracture
- Issue Date
- 2003-12
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- Materials Science and Engineering: A, v. 363, issue. 1-2, page. 62-66
- Abstract
- Tensile deformation and fracture behavior of bulk nanocrystalline Ni-Fe alloy, synthesized by a mechano-chemical method plus hot-isostatic pressing, were investigated by using mechanical tests and fractography. The results indicate that the as-prepared specimen fails prematurely with fracture strength (sigma(f) similar to 1.15 GPa) lower than yield stress evaluated from hardness measurements. However, sigma(f) increases monotonously with time in isothermal (850 degreesC) annealing, in contrast to which microhardness (yield strength) decreases with the annealing time. Fractography indicates that for the as-prepared specimen inter-particle brittle cracking is the main fracture mode. Nevertheless, microscopically local ductile fracture morphology was revealed to exist as manifested by the appearance of nano-dimples. When annealing time t(a) > similar to1.2 h sigma(f) surpasses yield strength
- URI
- https://www.sciencedirect.com/science/article/pii/S0921509303004970https://repository.hanyang.ac.kr/handle/20.500.11754/156669
- ISSN
- 0921-5093
- DOI
- 10.1016/S0921-5093(03)00497-0
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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