TITLE

Interpreting the change in shear band inclination angle in metallic glasses

AUTHOR(S)
Ming Zhao; Mo Li
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p241906
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Shear bands in metallic glasses subject to uniaxial loading such as tension and compression exhibit the inclination angle different from 45° on the maximum resolved shear stress plane with respect to the loading axis. The cause is often attributed to the effective normal stress acting on the shear plane, which also suggests Coulomb–Mohr yield criterion for metallic glasses. We show here that this argument is conceptually ill justified. Instead, shear band inclination angle can be described by a simple model taking into consideration the volume dilatation and the pressure effects.
ACCESSION #
35922130

 

Related Articles

  • The more shearing, the thicker shear band and heat-affected zone in bulk metallic glass. Guo, H.; Wen, J.; Xiao, N. M.; Zhang, Z. F.; Sui, M. L. // Journal of Materials Research;Aug2008, Vol. 23 Issue 8, p14 

    In a compression test for a Zr-based bulk metallic glass, a dominant shear band was preserved before fracture by a cylindrical stopper. A heat-affected zone (HAZ) ∼10 μm thick together with shear band was discovered in the center of the deformed sample by preferential ion milling. By...

  • Size-affected shear-band speed in bulk metallic glasses. Liu, Z. Y.; Yang, Y.; Liu, C. T. // Applied Physics Letters;10/24/2011, Vol. 99 Issue 17, p171904 

    In this letter, we report an important experimental finding and theoretical analysis of the shear-band speed measured in a variety of bulk metallic-glasses. Unlike the prior work, in which the shear-band speed was regarded as a constant, our current study, based on carefully designed...

  • Role of minor alloying additions in formation of bulk metallic glasses: A Review. Lu, Z. P.; Liu, C. T. // Journal of Materials Science;Jun2004, Vol. 39 Issue 12, p3965 

    Minor alloying addition or microalloying technology has already shown dramatic effects on glass formation and thermal stability of bulk metallic glasses (BMGs). This paper intends to provide a comprehensive review of recent developments of this technology in the field of BMGs. The beneficial...

  • Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System. Laws, Kevin J.; Shamlaye, Karl F.; Wong, Kenneth; Gun, Bulent; Ferry, Michael // Metallurgical & Materials Transactions. Part A;Jul2010, Vol. 41 Issue 7, p1699 

    A novel methodology for predicting specific compositions for glass-forming alloys based on efficiently packed atomic cluster selection, liquidus lines, and ab initio calculations is presented. This model has shown applicable adaptation to many known metallic and ceramic oxide glass-forming...

  • Highly processable bulk metallic glass-forming alloys in the Pt–Co–Ni–Cu–P system. Schroers, Jan; Johnson, William L. // Applied Physics Letters;5/3/2004, Vol. 84 Issue 18, p3666 

    Highly processable bulk metallic glass alloys in the Pt–Co–Ni–Cu–P system were discovered. The alloys show low liquidus temperature below 900 K, excellent processability with low critical cooling rate reflecting in maximum casting thicknesses in quartz tubes of up to...

  • Overheating threshold and its effect on time–temperature-transformation diagrams of zirconium based bulk metallic glasses. Mukherjee, S.; Zhou, Z.; Schroers, J.; Johnson, W. L.; Rhim, W. K. // Applied Physics Letters;6/14/2004, Vol. 84 Issue 24, p5010 

    A pronounced effect of overheating is observed on the crystallization behavior for the three zirconium-based bulk metallic glasses: Zr41.2Ti13.8Cu12.5Ni10Be22.5, Zr57Cu15.4Ni12.6Al10Nb5, and Zr52.5Cu17.9Ni14.6Al10Ti5. A threshold overheating temperature is found for each of the three alloys,...

  • Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass. Qingping Cao; Jinfi Li; Yaohe Zhou; Jianzhong Jiang // Applied Physics Letters;2/21/2005, Vol. 86 Issue 8, p081913 

    Rolling deformation of bulk Cu60Zr20Ti20 metallic glass has been performed at cryogenic temperature. The specimens exhibit excellent ductility, and are rolled up to 97% reduction in thickness without fracture. Crystallization is suppressed during the deformation, however, phase separation is...

  • Glass forming ability and short-range order in a binary bulk metallic glass by ab initio molecular dynamics. Jakse, N.; Pasturel, A. // Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p113104 

    We have performed a series of ab initio molecular dynamics simulations of Cu64Zr36 alloy, in order to study the glass forming ability in connection to the local order. The results show that Cu64Zr36 is characterized by a pronounced icosahedral short-range order (ISRO) in the liquid, undercooled,...

  • Glass-forming ability enhanced by proper additions of oxygen in a Fe-based bulk metallic glass. Li, H. X.; Gao, J. E.; Jiao, Z. B.; Wu, Y.; Lu, Z. P. // Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p161905 

    Effects of oxygen on glass formation in the Fe73Mo3.0C7.0Si3.3B5.0P8.7 bulk metallic glass were studied in detail. Surprisingly, it was found that a critical level of oxygen is effective in enhancing the glass-forming ability of the current Fe-based bulk metallic glass due to the facts that (i)...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics