Additive manufacturing of Ti-48Al-2Cr-2Nb alloy using gas atomized and mechanically alloyed plasma spheroidized powders

Igor Polozov; Artem Kantyukov; Ivan Goncharov; Nikolay Razumov; Alexey Silin; Vera Popovich; Jia Ning Zhu; Anatoly Popovich

doi:10.3390/ma13183952

Additive manufacturing of Ti-48Al-2Cr-2Nb alloy using gas atomized and mechanically alloyed plasma spheroidized powders

Igor Polozov^*, Artem Kantyukov, Ivan Goncharov, Nikolay Razumov, Alexey Silin, Vera Popovich, Jia Ning Zhu, Anatoly Popovich

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

19 Citations (Scopus)

40 Downloads (Pure)

Abstract

In this paper, laser powder-bed fusion (L-PBF) additive manufacturing (AM) with a high-temperature inductive platform preheating was used to fabricate intermetallic TiAl-alloy samples. The gas atomized (GA) and mechanically alloyed plasma spheroidized (MAPS) powders of the Ti-48Al-2Cr-2Nb (at. %) alloy were used as the feedstock material. The effects of L-PBF process parameters-platform preheating temperature-on the relative density, microstructure, phase composition, andmechanicalproperties ofprintedmaterialwere evaluated. Crack-free intermetallic samples with a high relative density of 99.9% were fabricated using 900 °C preheating temperature. Scanning electron microscopy and X-Ray diffraction analyses revealed a very fine microstructure consisting of lamellar α₂/γ colonies, equiaxed γ grains, and retained β phase. Compressive tests showed superior properties of AM material as compared to the conventional TiAl-alloy. However, increased oxygen content was detected inMAPS powder compared to GA powder (~1.1 wt. % and ~0.1 wt. %, respectively), which resulted in lower compressive strength and strain, but higher microhardness compared to the samples produced from GA powder.

Original language	English
Article number	3952
Number of pages	16
Journal	Materials
Volume	13
Issue number	18
DOIs	https://doi.org/10.3390/ma13183952
Publication status	Published - 2020

Keywords

Additive manufacturing
Mechanical alloying
Microstructure
Selective laser melting
Titanium alloy

Access to Document

10.3390/ma13183952

materials-13-03952-v2Final published version, 2.46 MBLicence: CC BY

Cite this

@article{173142eb4210424ebf5fa9c7d0c09b9e,

title = "Additive manufacturing of Ti-48Al-2Cr-2Nb alloy using gas atomized and mechanically alloyed plasma spheroidized powders",

abstract = "In this paper, laser powder-bed fusion (L-PBF) additive manufacturing (AM) with a high-temperature inductive platform preheating was used to fabricate intermetallic TiAl-alloy samples. The gas atomized (GA) and mechanically alloyed plasma spheroidized (MAPS) powders of the Ti-48Al-2Cr-2Nb (at. %) alloy were used as the feedstock material. The effects of L-PBF process parameters-platform preheating temperature-on the relative density, microstructure, phase composition, andmechanicalproperties ofprintedmaterialwere evaluated. Crack-free intermetallic samples with a high relative density of 99.9% were fabricated using 900 °C preheating temperature. Scanning electron microscopy and X-Ray diffraction analyses revealed a very fine microstructure consisting of lamellar α2/γ colonies, equiaxed γ grains, and retained β phase. Compressive tests showed superior properties of AM material as compared to the conventional TiAl-alloy. However, increased oxygen content was detected inMAPS powder compared to GA powder (~1.1 wt. % and ~0.1 wt. %, respectively), which resulted in lower compressive strength and strain, but higher microhardness compared to the samples produced from GA powder.",

keywords = "Additive manufacturing, Mechanical alloying, Microstructure, Selective laser melting, Titanium alloy",

author = "Igor Polozov and Artem Kantyukov and Ivan Goncharov and Nikolay Razumov and Alexey Silin and Vera Popovich and Zhu, {Jia Ning} and Anatoly Popovich",

year = "2020",

doi = "10.3390/ma13183952",

language = "English",

volume = "13",

journal = "Materials",

issn = "1996-1944",

publisher = "MDPI",

number = "18",

}

TY - JOUR

T1 - Additive manufacturing of Ti-48Al-2Cr-2Nb alloy using gas atomized and mechanically alloyed plasma spheroidized powders

AU - Polozov, Igor

AU - Kantyukov, Artem

AU - Goncharov, Ivan

AU - Razumov, Nikolay

AU - Silin, Alexey

AU - Popovich, Vera

AU - Zhu, Jia Ning

AU - Popovich, Anatoly

PY - 2020

Y1 - 2020

N2 - In this paper, laser powder-bed fusion (L-PBF) additive manufacturing (AM) with a high-temperature inductive platform preheating was used to fabricate intermetallic TiAl-alloy samples. The gas atomized (GA) and mechanically alloyed plasma spheroidized (MAPS) powders of the Ti-48Al-2Cr-2Nb (at. %) alloy were used as the feedstock material. The effects of L-PBF process parameters-platform preheating temperature-on the relative density, microstructure, phase composition, andmechanicalproperties ofprintedmaterialwere evaluated. Crack-free intermetallic samples with a high relative density of 99.9% were fabricated using 900 °C preheating temperature. Scanning electron microscopy and X-Ray diffraction analyses revealed a very fine microstructure consisting of lamellar α2/γ colonies, equiaxed γ grains, and retained β phase. Compressive tests showed superior properties of AM material as compared to the conventional TiAl-alloy. However, increased oxygen content was detected inMAPS powder compared to GA powder (~1.1 wt. % and ~0.1 wt. %, respectively), which resulted in lower compressive strength and strain, but higher microhardness compared to the samples produced from GA powder.

AB - In this paper, laser powder-bed fusion (L-PBF) additive manufacturing (AM) with a high-temperature inductive platform preheating was used to fabricate intermetallic TiAl-alloy samples. The gas atomized (GA) and mechanically alloyed plasma spheroidized (MAPS) powders of the Ti-48Al-2Cr-2Nb (at. %) alloy were used as the feedstock material. The effects of L-PBF process parameters-platform preheating temperature-on the relative density, microstructure, phase composition, andmechanicalproperties ofprintedmaterialwere evaluated. Crack-free intermetallic samples with a high relative density of 99.9% were fabricated using 900 °C preheating temperature. Scanning electron microscopy and X-Ray diffraction analyses revealed a very fine microstructure consisting of lamellar α2/γ colonies, equiaxed γ grains, and retained β phase. Compressive tests showed superior properties of AM material as compared to the conventional TiAl-alloy. However, increased oxygen content was detected inMAPS powder compared to GA powder (~1.1 wt. % and ~0.1 wt. %, respectively), which resulted in lower compressive strength and strain, but higher microhardness compared to the samples produced from GA powder.

KW - Additive manufacturing

KW - Mechanical alloying

KW - Microstructure

KW - Selective laser melting

KW - Titanium alloy

UR - http://www.scopus.com/inward/record.url?scp=85091342299&partnerID=8YFLogxK

U2 - 10.3390/ma13183952

DO - 10.3390/ma13183952

M3 - Article

AN - SCOPUS:85091342299

SN - 1996-1944

VL - 13

JO - Materials

JF - Materials

IS - 18

M1 - 3952

ER -

Additive manufacturing of Ti-48Al-2Cr-2Nb alloy using gas atomized and mechanically alloyed plasma spheroidized powders

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this