dc.creator | Katavić, Boris T. | |
dc.creator | Gligorijević, Bojan R. | |
dc.creator | Alil, Ana | |
dc.creator | Odanović, Zoran | |
dc.date.accessioned | 2023-03-20T12:34:37Z | |
dc.date.available | 2023-03-20T12:34:37Z | |
dc.date.issued | 2013 | |
dc.identifier.isbn | 987-86-87183-24-7 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6190 | |
dc.description.abstract | The precipitation behavior of W-rich phase on the specific matrix locations of
Co-free and Co-containing 92.5W-5Ni-2.5Fe heavy alloys is investigated during
aging of the as-quenched samples. The aging treatment is performed between 600
°C (873 K) and 800 °C (1073 K) and for aging time up to 9 hours. The average
chemical composition of tungsten heavy alloys was determined by using the atomic
absorption spectrophotometry (AAS) and the Leco apparatus. The Energy
Dispersive X-ray (EDX) analysis was employed to analyze the chemistry of the
existing phases. The changes in structure as a function of aging time and
temperature have been examined by using the light microscopy (LM) and the
scaning electron microscopy (SEM). The macro- and micro-hardness
measurements were performed, as well. The local changes in matrix structure and
various morphologies of the precipitates are observed. The aging has caused only
a minor changes of the micro-hardness of the existing phases (γ and W-rich) as
well as the macro-hardness of the investigated alloys. In the case of the Co-free
92.5W-5Ni-2.5Fe heavy alloy, at lower temperatures and for shorter time of aging,
there is a dominant presence of lamellar and Widmanstätten morphology of W-rich
precipitates within the γ-matrix grains. At higher temperatures and for longer time,
there is a significant precipitation of W-rich precipitates at the matrix grain
boundaries (γ/γ). In the case of 92.5W-5Ni-2.5Fe heavy alloy micro-alloyed with
Co, it is dominant precipitation of W-rich phase at the matrix grain boundaries (γ/γ),
especially at higher aging temperatures and for longer aging time. | sr |
dc.language.iso | en | sr |
dc.publisher | Association of Metallurgical Engineers of Serbia (AMES), Beograd | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe | sr |
dc.title | The effects of aging on the precipitation of the W-rich phase in the matrix of the 92.5W-5Ni-2,5Fe powder metallurgy heavy alloys | sr |
dc.type | conferenceObject | sr |
dc.rights.license | BY | sr |
dc.citation.spage | 435 | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_technorep_6190 | |
dc.type.version | publishedVersion | sr |