Laser Solid Forming (LSF) has been considered as a significant and promising technology to fabricate functionally graded materials. A rapidly solidified binary Nickel-Titanium graded material was fabricated by a CO2 laser solid forming equipment, using argon as the protecting gas. The compositional gradient in the graded alloy was changed from pure Ni to Ni-35at.%Ti in a thin-wall sample with the height of 24 mm. The results of SEM and EDS analysis showed that a series of phase evolutions, γ dendrite+ (γ+γ´) eutectic→ η platelet+(η+Ni3Ti2) eutectic→(η+Ni3Ti2) eutectic, along the graded direction with the increasing of Ni content. Phase formation and microstructure evolution was analyzed.
REFERENCES
1.
Li
Penga
, Yang
Taipingb
, Li
Sheng
. (2005
) International Journal of Machine Tools & Manufacture
. 45
1288
–1294
2.
3.
Jyotirmoy
Mazumder
, Huan
Qi
. (2005
) Proceedings of SPIE
5706
38
–60
4.
Li
yanmin
. (2001
) Research on technical characters and microstructure of Laser Solid Forming
. Doctoral dissertations of Northwestern Polytechnical University.
68
–75
5.
T.
Fukuda
,T.
Kakeshita
,H.
Houjoh
,etc. (1999
) Materials Science and Engineering A
. 273-275
166
–169
6.
R.
Nagarajan
, K.
Chattopadhyay
. Acta Metall Mater
. 42
(3
) 947
–958
7.
Hiroyuki
Nakayama
,Minoru
Taya
et al (2007
) Materials Science and Engineering A
. 459
52
–59
8.
A.L.
Liu
,Z.Y.
Gao
,L.
Gao
, et al (2007
) Journal of Alloys and Compounds
. 437
339
–343
9.
J.A.
Brooks
, C.V.
Robino
, M.L.
Griffith
, et al LDRD Final Report
. (2001
) Exploiting LENS Technology Throughs Novel Materials
. Sandia Report SAND 818610.
M.S.
Domac
, J.M.
Baughman
. (2005
) Rapid Prototyping Journal.
11
41
–51
11.
X.
Lin
, T. M.
Yue
, H. O.
Yang
, W. D.
Huang
, (2006
) Acta Materialia.
54
1901
–1915
12.
X.
Lin
, T.M.
Yue
, H. O.
Yang
, W. D.
Huang
, (2007
) Metallurgical and Materials Transactions A
. 138
127
–137
13.
X.
Lin
, H.O.
Yang
, J.
Chen
W.D.
Huang
, T.M.
Yue
, in ICALEO 2007
, Laser Institute of America
, Orlando, Florida. p
196
–199
14.
15.
X.
Lin
, T.M.
Yue
. (2005
) Materials Science and Engineering A.
402
294
–306
16.
K.
Hagihara
,T.
Nakano
,Y.
Umakoshi
. (2003
) Acta Materialia.
51
2623
–2637
17.
K.
Tomihisa
, Y.
Kaneno
, H.
Tsuda
, et al. (2004
) Intermetallics.
12
317
–325
18.
Y.
Nunomura
, Y.
Kaneno
, H.
Tsuda
, et al (2004
) Intermetallics.
12
389
–399
19.
K.
Otsuka
, X.
Ren
. (2005
) Progress in Materials Science.
50
516
–518
This content is only available via PDF.
© 2008 Laser Institute of America.
2008
Laser Institute of America
You do not currently have access to this content.