Studying fatigue behavior and Poisson's ratio of bulk-metallic glasses

2007 ◽  
Vol 15 (5-6) ◽  
pp. 663-667 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
A. Peker ◽  
W.H. Peter ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Poisson's Ratio

Toughness, extrinsic effects and Poisson’s ratio of bulk metallic glasses

2012 ◽  
Vol 60 (12) ◽  
pp. 4800-4809 ◽  
Author(s):  
S.V. Madge ◽  
D.V. Louzguine-Luzgin ◽  
J.J. Lewandowski ◽  
A.L. Greer
Keyword(s):  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Bulk Metallic Glasses ◽  
Poisson's Ratio ◽  
Extrinsic Effects

Effect of melt temperature on the mechanical properties of bulk metallic glasses

2009 ◽  
Vol 24 (7) ◽  
pp. 2353-2360 ◽  
Author(s):  
Golden Kumar ◽  
Tadakatsu Ohkubo ◽  
Kazuhiro Hono
Keyword(s):  
Mechanical Properties ◽  
Elastic Constants ◽  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Bulk Metallic Glasses ◽  
Amorphous Structure ◽  
Poisson's Ratio ◽  
Plastic Strains ◽  
Melt Temperature ◽  
Notable Effect

The effect of melt temperature on the structure and mechanical properties of three Zr-based bulk metallic glasses (BMGs)—Zr62Cu17Ni13Al8, Zr55Cu20Ni10Al10Ti5, and Zr52.5Cu17.9Ni14.6Al10Ti5 (Vit105)—has been studied. The results show that the BMGs cast from higher melt temperature exhibit large plastic strains despite their amorphous structure. The samples become macroscopically brittle when the quenched-in crystals form an interconnected microstructure. In contrast to previous studies, there is no notable effect on the Poisson’s ratio (ν) and other elastic constants.

Mechanical properties of iron-based bulk metallic glasses

2007 ◽  
Vol 22 (2) ◽  
pp. 344-351 ◽  
Author(s):  
X.J. Gu ◽  
S. Joseph Poon ◽  
Gary J. Shiflet
Keyword(s):  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Elastic Moduli ◽  
Bulk Metallic Glasses ◽  
Alloying Elements ◽  
Poisson's Ratio ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Structural Applications ◽  
Iron Based

Iron-based bulk metallic glasses (BMGs) are characterized by high fracture strengths and elastic moduli, with some exhibiting fracture strengths near 4 GPa, 2–3 times those of conventional high-strength steels. Among the Fe-based BMGs, the non-ferromagnetic ones, designated “non-ferromagnetic amorphous steel alloys” by two of the present authors [S.J. Poon et al.: Appl. Phys. Lett.83, 1131 (2003)], have glass-forming ability high enough to form single-phase glassy rods with diameters reaching 16 mm. Fe-based BMGs designed for structural applications must exhibit some plasticity under compression. However, the role of alloy composition on plastic and brittle failures in metallic glasses is largely unknown. In view of a recently observed correlation that exists between plasticity and Poisson’s ratio for BMGs, compositional effects on plasticity and elastic properties in amorphous steels were investigated. For the new amorphous steels, fracture strengths as high as 4.4 GPa and plastic strains reaching ∼0.8% were measured. Plastic failure instead of brittle failure was observed as the Poisson’s ratio approached 0.32 from below. Investigation of the relationship between the elastic moduli of the alloys and those of the alloying elements revealed that interatomic interactions in addition to the elastic moduli of the alloying elements must be considered in designing ductile Fe-based BMGs. The prospects for attaining high fracture toughness in Fe-based BMGs are discussed in this article.

scholarly journals Tension-Tension Fatigue Behavior of High-Toughness Zr61Ti2Cu25Al12 Bulk Metallic Glass

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2815
Author(s):  
Yu Hang Yang ◽  
Jun Yi ◽  
Na Yang ◽  
Wen Liang ◽  
Hao Ran Huang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Shear Band ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Fatigue Resistance ◽  
Metallic Glasses ◽  
Stress Amplitude ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
High Toughness

Bulk metallic glasses have application potential in engineering structures due to their exceptional strength and fracture toughness. Their fatigue resistance is very important for the application as well. We report the tension-tension fatigue damage behavior of a Zr61Ti2Cu25Al12 bulk metallic glass, which has the highest fracture toughness among BMGs. The Zr61Ti2Cu25Al12 glass exhibits a tension-tension fatigue endurance limit of 195 MPa, which is higher than that of high-toughness steels. The fracture morphology of the specimens depends on the applied stress amplitude. We found flocks of shear bands, which were perpendicular to the loading direction, on the surface of the fatigue test specimens with stress amplitude higher than the fatigue limit of the glass. The fatigue cracking of the glass initiated from a shear band in a shear band flock. Our work demonstrated that the Zr61Ti2Cu25Al12 glass is a competitive structural material and shed light on improving the fatigue resistance of bulk metallic glasses.

Correlation between Atomic Size Ratio and Poisson's Ratio in Metallic Glasses

2014 ◽  
Vol 31 (6) ◽  
pp. 066102 ◽  
Author(s):  
Ai-Kun Wang ◽  
Shi-Guang Wang ◽  
Rong-Jie Xue ◽  
Guo-Cai Liu ◽  
Kun Zhao
Keyword(s):  
Metallic Glasses ◽  
Poisson’S Ratio ◽  
Size Ratio ◽  
Poisson's Ratio ◽  
Atomic Size

Fatigue behavior of Zr–Ti–Ni–Cu–Be bulk-metallic glasses

2005 ◽  
Vol 13 (3-4) ◽  
pp. 429-435 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
A. Peker ◽  
B. Yang ◽  
M.L. Benson ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses

The influence of Pd on tension–tension fatigue behavior of Zr-based bulk-metallic glasses

2010 ◽  
Vol 32 (3) ◽  
pp. 599-604 ◽  
Author(s):  
G.Y. Wang ◽  
P.K. Liaw ◽  
Y. Yokoyama ◽  
M. Freels ◽  
A. Inoue
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses

Bending-fatigue behavior of bulk metallic glasses and their composites

JOM ◽  
2010 ◽  
Vol 62 (4) ◽  
pp. 25-33 ◽  
Author(s):  
Gongyao Wang ◽  
Peter K. Liaw
Keyword(s):  
Metallic Glasses ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
Bending Fatigue
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