Effects of Nitrogen on the Glass Formation and Mechanical Properties of a Ti-Based Metallic Glass

doi:10.1007/s40195-016-0374-5

Abstract

Abstract:

Effects of nitrogen addition on glass formation and mechanical properties of the Ti_42.5Cu₄₀Zr₁₀Ni₅Sn_2.5metallic glass were systematically investigated. It was found that a small amount of nitrogen addition facilitated the glass formation by suppressing formation of the competing eutectic structure. Unlike large atomic size elements such as Hf and Pd which usually deteriorate specific strength, nitrogen can also increase the specific strength of the current Ti-based BMGs. The results are not only helpful for understanding glass-forming ability in general, but also useful in developing cost-effective, high-performance Ti-based bulk metallic glasses with enhanced glass-forming ability.

Key words: Metallic, glass, Glass-forming, ability, Microalloying, Specific, strength

Di Cao, Yuan Wu, Hui Wang, Xiong-Jun Liu, Z. P. Lu. Effects of Nitrogen on the Glass Formation and Mechanical Properties of a Ti-Based Metallic Glass[J]. Acta Metallurgica Sinica (English Letters), 2016, 29(2): 173-180.

Figures/Tables 11

Fig. 1 Measured concentration of nitrogen in master alloys and as-cast rod samples with different N additions

Fig. 2 Microstructures of different samples: a 3-mm-diametered rod of base alloy; b 4-mm-diametered base alloy; c4-mm-diametered rod with 0.1 at% N; d center of 5-mm-diametered rod with 0.1 at% N; e 5-mm-diametered rod with 0.2 at% N; and f 1.5-mm-diametered rod with 0.5 at% N

Fig. 3 XRD patterns of as-cast rod samples with different N additions and diameters

Fig. 4 Bright-field image of the spherical phase in alloy doped with 0.1 at% N, and inset is the corresponding SAED pattern

Fig. 5 Dependence of microstructure on the N content and cooling rate in the Ti42.5Cu40Zr10Ni5Sn2.5 alloy

Table 1 Thermal properties and GFA indicators of the alloys with different nitrogen additions

Material	T _g(°C)	T _x(°C)	T _m(°C)	T _l(°C)	T _rg	ΔT(°C)	γ	Main competing phase
Base alloy	375.7	422.4	804.1	892.8	0.557	46.7	0.383	Ti₂Cu, TiNi, TiCu
0.05 at% N	382.8	427.2	803.6	891.8	0.563	44.4	0.385	-
0.1 at% N	383.1	427.2	803.2	890.0	0.564	44.1	0.385	Quasicrystal
0.2 at% N	385.1	429.0	804.5	892.3	0.565	43.9	0.385	Quasicrystal
0.3 at% N	389.4	432.3	802.1	892.3	0.569	42.9	0.386	Quasicrystal
0.5 at% N	-	-	-	-	-	-	-	α-Ti, Ti₂Cu

Fig. 6 DSC and DTA curves of the as-cast alloys with different nitrogen additions

Fig. 7 GFA indicator parameters and supercooled liquid region dependence on nitrogen content

Fig. 8 Schematic time-temperature-transformation (TTT) diagrams for base alloy and alloy with 0.1 at% N a, alloys with 0.1 and 0.2 at% N, and the alloy with 0.5 at% N c

Fig. 9 Compressive stress-strain curve of Ti-based BMGs with different N additions a, and variation of specific strength with nitrogen addition b

Table 2 Yielding stress, fracture stress, plastic strain and specific strength for different alloys

Material	σ _y (MPa)	σ _f (MPa)	ε _p	Specific strength (10⁵ Nm/kg)
Base alloy	2023	2023	0	3.018 ± 0.003
0.1 at% N	2072	2078	0.1%	3.070 ± 0.034
0.2 at% N	2086	2086	0	3.054 ± 0.042
0.3 at% N	2160	2170	0.1%	3.165 ± 0.033

References 44

[1]	G. Duan, A. Wiest, M.L. Lind, A. Kahl, W.L. Johnson, Scr.Mater. 58, 465(2008)
[2]	P. Gong, K.F. Yao, Y. Shao, J. Non Cryst. Solids 358, 2620 (2012)
[3]	X.H. Lin, W.L. Johnson, J. Appl. Phys. 78, 6514(1995)
[4]	Z.Y. Zhang, Y. Wu, J. Zhou, W.L. Song, D. Cao, H. Wang, X.J.Liu, Z.P. Lu, Intermetallics 42, 68 (2013)
[5]	Z.Y. Zhang, Y. Wu, J. Zhou, H. Wang, X.J. Liu, Z.P. Lu, Scr.Mater. 69, 73(2013)
[6]	H. Ma, L.L. Shi, J. Xu, Y. Li, E. Ma, J. Mater. Res. 21, 2204(2006)
[7]	H. Ma, Q. Zheng, J. Xu, Y. Li, E. Ma, J. Mater. Res. 20, 2252(2005)
[8]	C.L. Dai, H. Guo, Y. Shen, Y. Li, E. Ma, J. Xu, Scr. Mater. 54,1403(2006)
[9]	P. Jia, H. Guo, Y. Li, J. Xu, E. Ma, Scr. Mater. 54, 2165 (2006)
[10]	Z.P. Lu, C.T. Liu, J.R. Thompson, W.D. Porter, Phys. Rev. Lett.92, 245503(2004)
[11]	E.S. Park, H.K. Lim, W.T. Kim, D.H. Kim, J. Non Cryst. Solids 298, 15 (2002)
[12]	Y.L. Wang, E. Ma, J. Xu, Philos. Mag. Lett. 88, 319(2008)
[13]	Y.L. Wang, J. Xu, Metall. Mater. Trans. A 39, 2990 (2008)
[14]	M.Q. Tang, H.F. Zhang, Z.W. Zhu, H.M. Fu, A.M. Wang, H. Li,Z.Q. Hu, J. Mater. Sci. Technol. 26, 481(2010)
[15]	C.L. Ma, H. Soejima, S. Ishihara, K. Amiya, N. Nishiyama, A.Inoue, Mater. Trans. 45, 3223(2004)
[16]	J. Shen, Y.J. Huang, J.F. Sun, J. Mater. Res. 22, 3067(2007)
[17]	S.L. Zhu, X.M. Wang, A. Inoue, Intermetallics 16, 1031 (2008)
[18]	Z.Q. Liu, R. Li, H. Wang, T. Zhang, J. Alloys Compd. 509, 5033(2011)
[19]	D.J. Wang, Y.J. Huang, J. Shen, J. Non Cryst. Solids 355, 986 (2009)
[20]	B. Murty, D. Ping, K. Hono, A. Inoue, Appl. Phys. Lett. 76, 55(2000)
[21]	D. Turnbull, Contemp. Phys. 10, 473(1969)
[22]	Z.P. Lu, C.T. Liu, Acta Mater. 50, 3501(2002)
[23]	Z.P. Lu, C.T. Liu, Phys. Rev. Lett. 91, 115505(2003)
[24]	A. Inoue, T. Zhang, T. Masumoto, JIM 31, 177 (1990)
[25]	Z.P. Lu, D. Ma, C.T. Liu, Y.A. Chang, Intermetallics 15, 253 (2007)
[26]	Z.P. Lu, C.T. Liu, J. Mater. Sci. 39, 3965(2004)
[27]	Z.P. Lu, C.T. Liu, W.D. Porter, Appl. Phys. Lett. 83, 2581(2003)
[28]	H.A. Wriedt, J.L. Murray, Bull. Alloy Phase Diagrams 8, 378 (1987)
[29]	Z. Bian, H. Kato, C.L. Qin, W. Zhang, A. Inoue, Acta Mater. 53,2037 (2005)
[30]	A. Inoue, H. Kimura, K. Sasamori, T. Masumoto, Mater. Trans. JIM 36, 1219 (1995)
[31]	M.W. Chen, T. Zhang, A. Inoue, A. Sakai, T. Sakurai, Appl.Phys. Lett. 75, 1697(1999)
[32]	U. Ko¨ster, J. Meinhardt, S. Roos, H. Liebertz, Appl. Phys. Lett.69, 179(1996)
[33]	Y.C. Kim, J.H. Na, J.M. Park, D.H. Kim, J.K. Lee, W.T. Kim,Appl. Phys. Lett. 83, 3093(2003)
[34]	J. Saida, M. Matsushita, A. Inoue, JIM 41, 543 (2000)
[35]	J.L. Libbert, K.F. Kelton, Philos. Mag. Lett. 71, 153(1995)
[36]	D. Zander, R. Janlewing, A. Ru¨diger, U. Ko¨ster, Mater. Sci.Forum 307, 25 (1999)
[37]	B. Murty, D. Ping, K. Hono, A. Inoue, Acta Mater. 48, 3985(2000)
[38]	Y.H. Liu, C.T. Liu, W.H. Wang, A. Inoue, T. Sakurai, M.W.Chen, Phys. Rev. Lett. 103, 065504(2009)
[39]	B. Yang, C.T. Liu, T. Nieh, Appl. Phys. Lett. 88, 221911(2006)
[40]	P.F. Guan, M.W. Chen, T. Egami, Phys. Rev. Lett. 104, 205701(2010)
[41]	O.N. Senkov, D.B. Miracle, Mater. Res. Bull. 36, 2183 (2001)
[42]	M. Telford, Mater. Today 7, 36 (2004)
[43]	Z.B. Jiao, H.X. Li, J.E. Gao, Y. Wu, Z.P. Lu, Intermetallics 19,1502 (2011)
[44]	Y. Wu, H. Wang, Y.Q. Cheng, X.J. Liu, X.D. Hui, T.G. Nieh,Y.D. Wang, Z.P. Lu, Sci. Rep. 5, 12137(2015)