Nanoindentation experiments with a Berkovich indenter and a spherical indenter were performed to study the effects of annealing at temperatures below the glass transition temperature and room temperature ion irradiation on the near surface mechanical response of Ti40Cu32Pd14Zr10Sn2Si2 metallic glass (MG) ribbons. The specimens were isothermally annealed in vacuum at 573 K and 673 K for 4 hrs. Annealing was seen to increase the hardness of the specimens and decrease their ductility. The annealed specimens were subsequently irradiated by 3.5 MeV Cu2+ ions at room temperature using a fluence of 1 × 1012 ions/cm2 or 1 × 1016 ions/cm2. Nanoindentation experiments on the annealed and irradiated specimens showed a reduction in hardness and an increase in ductility for the specimens irradiated at a fluence of 1 × 1012 ions/cm2. Although the values of the mean contact pressure and critical shear stress under the spherical indenter showed an easier formation of shear bands after irradiation, increasing the irradiation fluence to 1 × 1016 ions/cm2 was seen to increase the hardness value and decrease the ductility of the specimens.

References

References
1.
Klement
,
W.
,
Willens
,
R. H.
, and
Duwez
,
P.
,
1960
, “
Non-Crystalline Structure in Solidified Gold-Silicon Alloys
,”
Nature
,
187
(
4740
), pp.
869
870
.
2.
Zhu
,
S. L.
,
Xie
,
G. Q.
,
Qin
,
F. X.
, and
Wang
,
X. M.
,
2013
, “
Effects of Minor Si Addition on Glass Formation and Thermal Stability of Ni Free Ti-Based Bulk Metallic Glass
,”
Mater. Sci. Forum
,
750
, pp.
36
39
.
3.
Oak
,
J. J.
,
Louzguine-Luzgin
,
D. V.
, and
Inoue
,
A.
,
2007
, “
Fabrication of Ni-Free Ti-Based Bulk-Metallic Glassy Alloy Having Potential for Application as Biomaterial, and Investigation of Its Mechanical Properties, Corrosion, and Crystallization Behavior
,”
J. Mater. Res.
,
22
(
5
), pp.
1346
1353
.
4.
Men
,
H.
,
Pang
,
S.
,
Inoue
,
A.
, and
Zhang
,
T.
,
2005
, “
New Ti-Based Bulk Metallic Glasses With Significant Plasticity
,”
Mater. Trans.
,
46
(
10
), pp.
2218
2220
.
5.
Lin
,
X. H.
, and
Johnson
,
W. L.
,
1995
, “
Formation of Ti–Zr–Cu–Ni Bulk Metallic Glasses
,”
J. Appl. Phys.
,
78
(
11
), pp.
6514
6519
.
6.
Liu
,
Z. Y.
,
Yang
,
Y.
,
Guo
,
S.
,
Liu
,
X. J.
,
Lu
,
J.
,
Liu
,
Y. H.
, and
Liu
,
C. T.
,
2011
, “
Cooling Rate Effect on Young's Modulus and Hardness of a Zr-Based Metallic Glass
,”
J. Alloys Compd.
,
509
(
7
), pp.
3269
3273
.
7.
Murali
,
P.
, and
Ramamurty
,
U.
,
2005
, “
Embrittlement of a Bulk Metallic Glass Due to Sub-Tg Annealing
,”
Acta Mater.
,
53
(
5
), pp.
1467
1478
.
8.
Wu
,
T. W.
, and
Spaepen
,
F.
,
1990
, “
The Relation Between Embrittlement and Structural Relaxation of an Amorphous Metal
,”
Philos. Mag. B
,
61
(
4
), pp.
739
750
.
9.
Ramamurty
,
U.
,
Jana
,
S.
,
Kawamura
,
Y.
, and
Chattopadhyay
,
K.
,
2005
, “
Hardness and Plastic Deformation in a Bulk Metallic Glass
,”
Acta Mater.
,
53
(
3
), pp.
705
717
.
10.
Yoo
,
B. G.
,
Park
,
K. W.
,
Lee
,
J. C.
,
Ramamurty
,
U.
, and
Jang
,
J. I.
,
2009
, “
Role of Free Volume in Strain Softening of As-Cast and Annealed Bulk Metallic Glass
,”
J. Mater. Res.
,
24
(
4
), pp.
1405
1416
.
11.
Ramamurty
,
U.
,
Lee
,
M. L.
,
Basu
,
J.
, and
Li
,
Y.
,
2002
, “
Embrittlement of a Bulk Metallic Glass Due to Low-Temperature Annealing
,”
Scr. Mater.
,
47
(
2
), pp.
107
111
.
12.
Lucca
,
D. A.
,
Zare
,
A.
,
Klopfstein
,
M. J.
,
Shao
,
L.
, and
Xie
,
G. Q.
,
2014
, “
Investigation of the Mechanical Behavior of Ion Irradiated Ni-Free Ti-Based Metallic Glass by Nanoindentation
,”
CIRP Ann. Manuf. Technol.
,
63
(
1
), pp.
533
536
.
13.
Raghavan
,
R.
,
Kombaiah
,
B.
,
Dobeli
,
M.
,
Erni
,
R.
,
Ramamurty
,
U.
, and
Michler
,
J.
,
2012
, “
Nanoindentation Response of an Ion Irradiated Zr-Based Bulk Metallic Glass
,”
Mater. Sci. Eng. A
,
532
, pp.
407
413
.
14.
Raghavan
,
R.
,
Boopathy
,
K.
,
Ghisleni
,
R.
,
Pouchon
,
M. A.
,
Ramamurty
,
U.
, and
Michler
,
J.
,
2010
, “
Ion Irradiation Enhances the Mechanical Performance of Metallic Glasses
,”
Scr. Mater.
,
62
(
7
), pp.
462
465
.
15.
Hu
,
Z.
,
Zhao
,
Z.
,
Hu
,
Y.
,
Xing
,
J.
,
Lu
,
T.
, and
Wei
,
B.
,
2012
, “
Effect of Ion Irradiation on Mechanical Behaviors of Ti40Zr25Be30Cr5 Bulk Metallic Glass
,”
Mater. Res.
,
15
(
5
), pp.
713
717
.
16.
Ziegler
,
J. F.
,
Biersack
,
J. P.
, and
Littmark
,
U.
,
1985
,
The Stopping and Range of Ions in Solids
,
Pergamon
,
New York
.
17.
Oliver
,
W. C.
, and
Pharr
,
G. M.
,
1992
, “
An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation Experiments
,”
J. Mater. Res.
,
7
(
6
), pp.
1564
1583
.
18.
ISO 14577-4
,
2002
,
Metallic Materials—Instrumented Indentation Test for Hardness and Materials Parameters—Part 4: Test Method for Metallic and Non-Metallic Coatings
,
ISO
,
Geneva, Switzerland
.
19.
Lucca
,
D. A.
,
Herrmann
,
K.
, and
Klopfstein
,
M. J.
,
2010
, “
Nanoindentation: Measuring Methods and Applications
,”
CIRP Ann. Manuf. Technol.
,
59
(
2
), pp.
803
819
.
20.
Miller
,
M. K.
, and
Liaw
,
P.
,
2007
,
Bulk Metallic Glasses: An Overview
,
Springer Science and Business Media
,
New York
.
21.
Trexler
,
M. M.
, and
Thadhani
,
N. N.
,
2010
, “
Mechanical Properties of Bulk Metallic Glasses
,”
Prog. Mater. Sci.
,
55
(
8
), pp.
759
839
.
22.
Schuh
,
C. A.
,
Hufnagel
,
T. C.
, and
Ramamurty
,
U.
,
2007
, “
Mechanical Behavior of Amorphous Alloys
,”
Acta Mater.
,
55
(
12
), pp.
4067
4109
.
23.
Zhao
,
L.
,
Ma
,
C. L.
,
Fu
,
M. W.
, and
Zeng
,
X. R.
,
2011
, “
Investigation on the Structural Characteristics of Metallic Glasses Based on the First Displacement Excursion Behavior in Nanoindentation
,”
Mater. Sci. Eng. A
,
530
, pp.
196
201
.
24.
Wang
,
L.
,
Lu
,
Z. P.
, and
Nieh
,
T. G.
,
2011
, “
Onset of Yielding and Shear Band Nucleation in an Au-Based Bulk Metallic Glass
,”
Scr. Mater.
,
65
(
9
), pp.
759
762
.
25.
Bei
,
H.
,
Lu
,
Z. P.
, and
George
,
E. P.
,
2004
, “
Theoretical Strength and the Onset of Plasticity in Bulk Metallic Glasses Investigated by Nanoindentation With a Spherical Indenter
,”
Phys. Rev. Lett.
,
93
(
12
), p.
125504
.
26.
Huang
,
Y.
,
Chiu
,
Y. L.
,
Shen
,
J.
,
Chen
,
J. J.
, and
Sun
,
J.
,
2009
, “
Nanoindentation Study of Ti-Based Metallic Glasses
,”
J. Alloys Compd.
,
479
(
1
), pp.
121
128
.
27.
Wang
,
K.
,
Chen
,
M. W.
,
Pan
,
D.
,
Fujita
,
T.
,
Zhang
,
W.
,
Wang
,
X. M.
, and
Inoue
,
A.
,
2008
, “
Plastic Deformation Energy of Bulk Metallic Glasses
,”
Mater. Sci. Eng. B
,
148
(
1
), pp.
101
104
.
28.
Choi
,
I. C.
,
Zhao
,
Y.
,
Kim
,
Y. J.
,
Yoo
,
B. G.
,
Suh
,
J. Y.
,
Ramamurty
,
U.
, and
Jang
,
J. I.
,
2012
, “
Indentation Size Effect and Shear Transformation Zone Size in a Bulk Metallic Glass in Two Different Structural States
,”
Acta Mater.
,
60
(
19
), pp.
6862
6868
.
You do not currently have access to this content.