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
Апстракт
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.
Извор:
Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe, 2013, 435-Издавач:
- Association of Metallurgical Engineers of Serbia (AMES), Beograd
Институција/група
Inovacioni centarTY - CONF AU - Katavić, Boris T. AU - Gligorijević, Bojan R. AU - Alil, Ana AU - Odanović, Zoran PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6190 AB - 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. PB - Association of Metallurgical Engineers of Serbia (AMES), Beograd C3 - Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe T1 - 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 SP - 435 UR - https://hdl.handle.net/21.15107/rcub_technorep_6190 ER -
@conference{ author = "Katavić, Boris T. and Gligorijević, Bojan R. and Alil, Ana and Odanović, Zoran", year = "2013", 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.", publisher = "Association of Metallurgical Engineers of Serbia (AMES), Beograd", journal = "Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe", 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", pages = "435", url = "https://hdl.handle.net/21.15107/rcub_technorep_6190" }
Katavić, B. T., Gligorijević, B. R., Alil, A.,& Odanović, Z.. (2013). 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. in Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe Association of Metallurgical Engineers of Serbia (AMES), Beograd., 435. https://hdl.handle.net/21.15107/rcub_technorep_6190
Katavić BT, Gligorijević BR, Alil A, Odanović Z. 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. in Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe. 2013;:435. https://hdl.handle.net/21.15107/rcub_technorep_6190 .
Katavić, Boris T., Gligorijević, Bojan R., Alil, Ana, Odanović, Zoran, "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" in Programme and book of abstracts of the 1st Metallurgical and Materials Engineering Congress of South-East Europe (2013):435, https://hdl.handle.net/21.15107/rcub_technorep_6190 .