A comparison was made between layer-by-layer laser melting (LM) of two types of feedstock powders: (1) elemental powder blend and (2) mechanically alloyed powder. LM was done by Nd:YAG laser at 1064 nm (max. average power 100 W) in argon ambience. Samples synthesized were Cu-Ti-TiB2 rectangular tracks (20x6x1 mm), and input parameters of the process: powder layer thickness 100-250 µm, hatch spacing 1 mm, pulse length 4 ms, energy 4 J, pulse repetition rate 20 Hz. Part of the samples was heat-treated in argon at 900 °C, 10 h. Structural characterization of the samples was done using light microscope and scanning electron microscope (SEM). Chemical analysis of the as-obtained laser melted samples was done by inductively coupled plasma-atomic emission spectrometry (ICP-AES). It was established that the microstructure of LM samples was comprised of Cu-Ti and Cu-B solid regions, and in situ formed microparticles of primary TiB2. Only after high-temperature thermal treatment has the secondar...y TiB2 occurred. Tensile tests showed much higher strengthening in heat-treated samples with mechanically alloyed powder as starting material, where the formation of secondary TiB2 nanoparticles was considerable.
Кључне речи:
Cu-Ti-TiB2 alloy / Blending and mechanical alloying / Laser melting / Heat treatment / In situ TiB2 reinforcements
TY - JOUR
AU - Stašić, Jelena
AU - Božić, Dušan
PY - 2020
UR - https://vinar.vin.bg.ac.rs/handle/123456789/8976
AB - A comparison was made between layer-by-layer laser melting (LM) of two types of feedstock powders: (1) elemental powder blend and (2) mechanically alloyed powder. LM was done by Nd:YAG laser at 1064 nm (max. average power 100 W) in argon ambience. Samples synthesized were Cu-Ti-TiB2 rectangular tracks (20x6x1 mm), and input parameters of the process: powder layer thickness 100-250 µm, hatch spacing 1 mm, pulse length 4 ms, energy 4 J, pulse repetition rate 20 Hz. Part of the samples was heat-treated in argon at 900 °C, 10 h. Structural characterization of the samples was done using light microscope and scanning electron microscope (SEM). Chemical analysis of the as-obtained laser melted samples was done by inductively coupled plasma-atomic emission spectrometry (ICP-AES). It was established that the microstructure of LM samples was comprised of Cu-Ti and Cu-B solid regions, and in situ formed microparticles of primary TiB2. Only after high-temperature thermal treatment has the secondary TiB2 occurred. Tensile tests showed much higher strengthening in heat-treated samples with mechanically alloyed powder as starting material, where the formation of secondary TiB2 nanoparticles was considerable.
T2 - Science of Sintering
T1 - The effect of synthesis of the starting powders on the properties of Cu-Ti-TiB2 alloy obtained by laser melting
VL - 52
IS - 1
SP - 15
EP - 23
DO - 10.2298/SOS2001015S
ER -
@article{
author = "Stašić, Jelena and Božić, Dušan",
year = "2020",
abstract = "A comparison was made between layer-by-layer laser melting (LM) of two types of feedstock powders: (1) elemental powder blend and (2) mechanically alloyed powder. LM was done by Nd:YAG laser at 1064 nm (max. average power 100 W) in argon ambience. Samples synthesized were Cu-Ti-TiB2 rectangular tracks (20x6x1 mm), and input parameters of the process: powder layer thickness 100-250 µm, hatch spacing 1 mm, pulse length 4 ms, energy 4 J, pulse repetition rate 20 Hz. Part of the samples was heat-treated in argon at 900 °C, 10 h. Structural characterization of the samples was done using light microscope and scanning electron microscope (SEM). Chemical analysis of the as-obtained laser melted samples was done by inductively coupled plasma-atomic emission spectrometry (ICP-AES). It was established that the microstructure of LM samples was comprised of Cu-Ti and Cu-B solid regions, and in situ formed microparticles of primary TiB2. Only after high-temperature thermal treatment has the secondary TiB2 occurred. Tensile tests showed much higher strengthening in heat-treated samples with mechanically alloyed powder as starting material, where the formation of secondary TiB2 nanoparticles was considerable.",
journal = "Science of Sintering",
title = "The effect of synthesis of the starting powders on the properties of Cu-Ti-TiB2 alloy obtained by laser melting",
volume = "52",
number = "1",
pages = "15-23",
doi = "10.2298/SOS2001015S"
}
Stašić, J.,& Božić, D.. (2020). The effect of synthesis of the starting powders on the properties of Cu-Ti-TiB2 alloy obtained by laser melting. in Science of Sintering, 52(1), 15-23.
https://doi.org/10.2298/SOS2001015S
Stašić J, Božić D. The effect of synthesis of the starting powders on the properties of Cu-Ti-TiB2 alloy obtained by laser melting. in Science of Sintering. 2020;52(1):15-23.
doi:10.2298/SOS2001015S .
Stašić, Jelena, Božić, Dušan, "The effect of synthesis of the starting powders on the properties of Cu-Ti-TiB2 alloy obtained by laser melting" in Science of Sintering, 52, no. 1 (2020):15-23,
https://doi.org/10.2298/SOS2001015S . .
, 
