Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

WANG Pan; LIU Tianwei; WANG Shugang; JIANG Chi; YANG Fan

doi:10.7510/jgjs.issn.1001-3806.2016.02.022

Volume 40 Issue 2

Dec. 2015

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Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

1.
Science and Technology on Surface Physics and Chemistry Laboratory, Chinese Academy of Engineering Physics, Mianyang 621907, China;
2.
Institute of Material, Chinese Academy of Engineering Physics, Mianyang 621907, China

Corresponding author: LIU Tianwei, liutianwei@caep.cn ;
Received Date: 2014-12-23
Accepted Date: 2015-03-17

Abstract

In order to prepare high-performance and large-size tungsten alloy parts, the preliminary experiments were carried out by using the laser solid forming technique. Various proportions of W-Ni-Fe high-density alloy mechanical tensile test pieces were prepared under atmospheric conditions. By testing tensile strength and hardness, by analyzing the structure and the compents proportions, the differences between the traditional powder metallurgy sintering process and formability and mechanical properties were found. The results show that the maximum tensile strength reaches 717.5MPa under 0.6 of W atomicity fraction and it decreases significantly with the increase of W atomicity fraction. When atomicity fraction of W atom is more than 0.8, the strength is lower than 400MPa. Holes and oxidation phenomenon exist in the samples. A large number of W doesn't melt. The more Ni, Fe elements, the better microstructure uniformity, the smaller composition segregation. The results preesent that tungsten alloy can be formed by laser solid forming technique but experiment process parameters and experimental environment remain to be further improved. Samples can be obtained free from effect of atmosphere and process parameters limits based on this study. Furthemore, the study is helpful to obtain better performance of tungsten alloy laser solid forming parts.
- laser technique,
- laser solid forming,
- W-Ni-Fe high-proportion alloy,
- performance test,
- micostructure analysis

References

[1]	FAN A G, SHI Y H. Research progress of high performance bombed tungsten heavy alloy in foreign[J]. Ordnance Material Science and Engineering, 1999, 22(1):45-48(in Chinese).
[2]	ZHONG M L, LIU W J, NING G Q, et al. Laser direct manufacturing of tungsten nickel collimation component[J]. Journal of Materials Processing Technology, 2004, 147(2):167-173.
[3]	GU D D, SHEN Y F, PAN Y F, et al. Study on direct metal laser sintering forming mechanism[J]. Journal of Materials Engineering, 2004, 5(1):42-48(in Chinese).
[4]	ZHONG M L, YANG L, LIU W J, et al. Laser direct manufacturing of alloy W/Ni space telescope collimator[J]. Chinese Journal of Lasers, 2004, 31(4):482-486(in Chinese).
[5]	MING X L, CHEN J, TAN H, et al. Coarsening behavior of gamma phase in GH4169 superalloy fabricated by laser solid forming[J]. Journal of Materials Engineering, 2014, 15(8):8-14(in Chinese).
[6]	LIU F Ch, LIN X, YU X B, et al. Evolution of interface and crystal orientation of laser solid formed GH4169 superalloy during recrystallization[J]. Acta Metallurgica Sinica, 2014, 50(4):463-470(in Chinese).
[7]	QIAN Y H, TAN H, LI J, et al. Microstructure characterization of laser solid forming Ti-6Al-4V alloy by high power[J]. Rare Metal Materials and Engineering, 2014, 43(9):2162-2166(in Chinese).
[8]	YANG J Q, CHEN J, ZHAO W Q, et al. Study on the rate of crack propagation of laser solid forming of TC11DT titanium alloy[J]. Applied Laser, 2014,34(4):277-282(in Chinese).
[9]	LI J, LIN X, QIAN Y H, et al. Study on microstructures and mechanical properties of TC4 titanium alloy by laser solid forming[J]. Chinese Journal of Lasers, 2014,41(11):29-33(in Chinese).
[10]	CHEN J, ZHANG R, ZHANG Q, et al. Influence of laser solid forming Ti60 alloy microstructure and defects on the performance[J]. Rare Metal Materials and Engineering, 2014, 43(3):548-552(in Chinese).
[11]	ZHANG X H, LIN X, CHEN J, et al. Effect of heat treatment on Microstructure and mechanical properties of TA15 alloy by laser solid forming[J]. Rare Metal Materials and Engineering,2011,40(1):142-147(in Chinese).
[12]	ZHAO W Q, CHEN J, YANG J Q, et al. Influence of laser solid forming process on microstructure and mechanical properties of TC11 titanium alloy[J]. Applied Laser, 2012,32(6):479-483(in Chinese).
[13]	ZHANG Q, CHEN J, HAN Ch X, et al. Laser repair heat affected zone depth on tensile properties of TC17-TC11 dual alloy[J]. Applied Laser, 2012,32(4):267-271(in Chinese).
[14]	YANG H O, SONG M H, YANG D H, et al. The evolution of laser solid forming of 300M ultra high strength steel organization[J]. Applied Laser, 2011,5(4):32-37(in Chinese).
[15]	WU X Y, LIN X, L X W, et al. Research on the microstructure and properties of 17-4 PH stainless steel by laser solid forming[J]. Chinese Journal of Lasers, 2011,38(2):37-42(in Chinese).
[16]	SUN Y Y, HUANG W. Progress of the application of selective laser processing technology in the field of oral medicine[J]. Journal of Dental Prevention and Treatment, 2014,22(2):109-112(in Chinese).
[17]	WANG Y, LI Y. Application and analysis of biological toxicity of Ti Zr alloy in oral repair[J]. Guide of China Medicine, 2012,10(12):234-235(in Chinese).
[18]	YAN X D. Study on preparation and properties of Ti Zr alloy laser solid forming powder for dental restoration[D]. Xi'an:The Fourth Military Medical University, 2005:6-8(in Chinese).
[19]	LI J M, WANG Ch M,YAN F, et al. Study on microstructure and mechanical properties of 6005A joint in laser-MIG hybrid welding[J]. Laser Technology,2014,38(6):733-737(in Chinese).
[20]	ZHANG M K, SUN G F, ZHANG W, et al. Study on corrosion property of laser surface alloyed Cr-CrB2 layers on stainless steel[J]. Laser Technology,2014,38(2):240-245(in Chinese).
[21]	HUANG W D. Laser solid forming[M]. Xi'an:Northwestern Polytechnical University Press,2007:16(in Chinese).

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Corresponding author: LIU Tianwei, liutianwei@caep.cn;

1. Science and Technology on Surface Physics and Chemistry Laboratory, Chinese Academy of Engineering Physics, Mianyang 621907, China;

2. Institute of Material, Chinese Academy of Engineering Physics, Mianyang 621907, China

Received Date: 2014-12-23

Accepted Date: 2015-03-17

Available Online: 2016-03-25

Abstract: In order to prepare high-performance and large-size tungsten alloy parts, the preliminary experiments were carried out by using the laser solid forming technique. Various proportions of W-Ni-Fe high-density alloy mechanical tensile test pieces were prepared under atmospheric conditions. By testing tensile strength and hardness, by analyzing the structure and the compents proportions, the differences between the traditional powder metallurgy sintering process and formability and mechanical properties were found. The results show that the maximum tensile strength reaches 717.5MPa under 0.6 of W atomicity fraction and it decreases significantly with the increase of W atomicity fraction. When atomicity fraction of W atom is more than 0.8, the strength is lower than 400MPa. Holes and oxidation phenomenon exist in the samples. A large number of W doesn't melt. The more Ni, Fe elements, the better microstructure uniformity, the smaller composition segregation. The results preesent that tungsten alloy can be formed by laser solid forming technique but experiment process parameters and experimental environment remain to be further improved. Samples can be obtained free from effect of atmosphere and process parameters limits based on this study. Furthemore, the study is helpful to obtain better performance of tungsten alloy laser solid forming parts.

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Reference (21)

[1]	FAN A G, SHI Y H. Research progress of high performance bombed tungsten heavy alloy in foreign[J]. Ordnance Material Science and Engineering, 1999, 22(1):45-48(in Chinese).
[2]	ZHONG M L, LIU W J, NING G Q, et al. Laser direct manufacturing of tungsten nickel collimation component[J]. Journal of Materials Processing Technology, 2004, 147(2):167-173.
[3]	GU D D, SHEN Y F, PAN Y F, et al. Study on direct metal laser sintering forming mechanism[J]. Journal of Materials Engineering, 2004, 5(1):42-48(in Chinese).
[4]	ZHONG M L, YANG L, LIU W J, et al. Laser direct manufacturing of alloy W/Ni space telescope collimator[J]. Chinese Journal of Lasers, 2004, 31(4):482-486(in Chinese).
[5]	MING X L, CHEN J, TAN H, et al. Coarsening behavior of gamma phase in GH4169 superalloy fabricated by laser solid forming[J]. Journal of Materials Engineering, 2014, 15(8):8-14(in Chinese).
[6]	LIU F Ch, LIN X, YU X B, et al. Evolution of interface and crystal orientation of laser solid formed GH4169 superalloy during recrystallization[J]. Acta Metallurgica Sinica, 2014, 50(4):463-470(in Chinese).
[7]	QIAN Y H, TAN H, LI J, et al. Microstructure characterization of laser solid forming Ti-6Al-4V alloy by high power[J]. Rare Metal Materials and Engineering, 2014, 43(9):2162-2166(in Chinese).
[8]	YANG J Q, CHEN J, ZHAO W Q, et al. Study on the rate of crack propagation of laser solid forming of TC11DT titanium alloy[J]. Applied Laser, 2014,34(4):277-282(in Chinese).
[9]	LI J, LIN X, QIAN Y H, et al. Study on microstructures and mechanical properties of TC4 titanium alloy by laser solid forming[J]. Chinese Journal of Lasers, 2014,41(11):29-33(in Chinese).
[10]	CHEN J, ZHANG R, ZHANG Q, et al. Influence of laser solid forming Ti60 alloy microstructure and defects on the performance[J]. Rare Metal Materials and Engineering, 2014, 43(3):548-552(in Chinese).
[11]	ZHANG X H, LIN X, CHEN J, et al. Effect of heat treatment on Microstructure and mechanical properties of TA15 alloy by laser solid forming[J]. Rare Metal Materials and Engineering,2011,40(1):142-147(in Chinese).
[12]	ZHAO W Q, CHEN J, YANG J Q, et al. Influence of laser solid forming process on microstructure and mechanical properties of TC11 titanium alloy[J]. Applied Laser, 2012,32(6):479-483(in Chinese).
[13]	ZHANG Q, CHEN J, HAN Ch X, et al. Laser repair heat affected zone depth on tensile properties of TC17-TC11 dual alloy[J]. Applied Laser, 2012,32(4):267-271(in Chinese).
[14]	YANG H O, SONG M H, YANG D H, et al. The evolution of laser solid forming of 300M ultra high strength steel organization[J]. Applied Laser, 2011,5(4):32-37(in Chinese).
[15]	WU X Y, LIN X, L X W, et al. Research on the microstructure and properties of 17-4 PH stainless steel by laser solid forming[J]. Chinese Journal of Lasers, 2011,38(2):37-42(in Chinese).
[16]	SUN Y Y, HUANG W. Progress of the application of selective laser processing technology in the field of oral medicine[J]. Journal of Dental Prevention and Treatment, 2014,22(2):109-112(in Chinese).
[17]	WANG Y, LI Y. Application and analysis of biological toxicity of Ti Zr alloy in oral repair[J]. Guide of China Medicine, 2012,10(12):234-235(in Chinese).
[18]	YAN X D. Study on preparation and properties of Ti Zr alloy laser solid forming powder for dental restoration[D]. Xi'an:The Fourth Military Medical University, 2005:6-8(in Chinese).
[19]	LI J M, WANG Ch M,YAN F, et al. Study on microstructure and mechanical properties of 6005A joint in laser-MIG hybrid welding[J]. Laser Technology,2014,38(6):733-737(in Chinese).
[20]	ZHANG M K, SUN G F, ZHANG W, et al. Study on corrosion property of laser surface alloyed Cr-CrB2 layers on stainless steel[J]. Laser Technology,2014,38(2):240-245(in Chinese).
[21]	HUANG W D. Laser solid forming[M]. Xi'an:Northwestern Polytechnical University Press,2007:16(in Chinese).

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views