scholarly journals Critical serrated flow features during nanoindentation in La-based bulk metallic glasses

2007 ◽  
Vol 14 ◽  
pp. 8-12 ◽  
Author(s):  
Wei Peng ◽  
Taihua Zhang ◽  
Yuan Liu ◽  
Lei Li ◽  
Bingchen Wei
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Serrated Flow ◽  
Flow Features

scholarly journals Temperature, Strain and Strain Rate Dependence of Serrated Flow in Bulk Metallic Glasses

2007 ◽  
Vol 48 (7) ◽  
pp. 1774-1780 ◽  
Author(s):  
Florian H. Dalla Torre ◽  
Alban Dubach ◽  
Adrienne Nelson ◽  
Jörg F. Löffler
Keyword(s):  
Strain Rate ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Serrated Flow ◽  
Strain And Strain Rate ◽  
Temperature Strain

scholarly journals Depth-sensing indentation tests in studying plastic instabilities

2004 ◽  
Vol 19 (1) ◽  
pp. 31-45 ◽  
Author(s):  
N.Q. Chinh ◽  
J. Gubicza ◽  
Zs. Kovács ◽  
J. Lendvai
Keyword(s):  
Grain Size ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Solute Concentration ◽  
Metal Alloys ◽  
Depth Sensing ◽  
Serrated Flow ◽  
Indentation Tests ◽  
Grain Size And Orientation

This review surveys the phenomenon of plastic instabilities occurring in depth-sensing indentation measurements. Investigations presented focus on the characterization of Portevin–Le Châtelier type instabilities observed in different metal alloys during indentation. The effect of some important factors such as solute concentration, the formation of Guinier–Preston zones, and grain size and orientation are described and discussed. The phenomenon of plastic instabilities as serrated flow recently observed in bulk metallic glasses is also briefly reviewed.

Effects of Ni and Si additions on mechanical properties and serrated flow behavior in FeMoPCB bulk metallic glasses

2019 ◽  
Vol 783 ◽  
pp. 555-564 ◽  
Author(s):  
Jing Zhou ◽  
Baoan Sun ◽  
Qianqian Wang ◽  
Qiuman Yang ◽  
Weiming Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glasses ◽  
Flow Behavior ◽  
Bulk Metallic Glasses ◽  
Serrated Flow

Origin of serrated flow in bulk metallic glasses

2019 ◽  
Vol 124 ◽  
pp. 634-642 ◽  
Author(s):  
Xie Xie ◽  
Yu-Chieh Lo ◽  
Yang Tong ◽  
Junwei Qiao ◽  
Gongyao Wang ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Serrated Flow

Stick–slip behavior of serrated flow during inhomogeneous deformation of bulk metallic glasses

2010 ◽  
Vol 58 (10) ◽  
pp. 3742-3750 ◽  
Author(s):  
Florian H. Dalla Torre ◽  
David Klaumünzer ◽  
Robert Maaß ◽  
Jörg F. Löffler
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Inhomogeneous Deformation ◽  
Stick Slip ◽  
Serrated Flow

Plastic Deformation of Bulk Amorphous Alloys

2000 ◽  
Vol 644 ◽  
Author(s):  
L.Q. Xing ◽  
T.C. Hufnagel ◽  
K.T. Ramesh
Keyword(s):  
Plastic Deformation ◽  
Plastic Strain ◽  
Metallic Glasses ◽  
Shear Bands ◽  
Bulk Metallic Glasses ◽  
Serrated Flow ◽  
Perfectly Plastic ◽  
Elastic Loading ◽  
The Difference ◽  
Elastic Perfectly Plastic

AbstractWe have studied plastic deformation, including “serrated flow,” of bulk metallic glasses under quasi-static uniaxial compression. The deformation response is essentially elastic-perfectly plastic, but the “plastic” deformation actually consists of sections of elastic loading separated by abrupt load drops. The load drops are due to the formation of shear bands, which represent the primary mechanism of plastic deformationIn Zr-Ti-Cu-Ni-Al bulk metallic glasses, fracture occurs after about 1-2% plastic strain, but in Zr-Ta-Cu-Ni-Al metallic glass the plastic strain to failure can be as large as 6-7%. The difference appears to be due a strong tendency for the shear bands in this alloy to branch. The branching presumably reduces the stress concentration on the shear bands, retarding the onset of fracture. No evidence is seen for the formation of crystalline phases in this alloy.

scholarly journals Beyond Serrated Flow in Bulk Metallic Glasses: What Comes Next?

2020 ◽  
Vol 51 (11) ◽  
pp. 5597-5605
Author(s):  
R. Maaß
Keyword(s):  
Annual Meeting ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Future Research ◽  
Research Topics ◽  
Research Directions ◽  
Serrated Flow ◽  
Strain Behavior ◽  
Flow Response ◽  
Inhomogeneous Flow

Abstract This manuscript is based on an oral contribution to the TMS 2020 annual meeting and is dedicated to Prof. Peter Liaw, who for decades has shown great interest in serrated plastic flow. Here we will focus on the case of bulk metallic glasses, and begin with briefly summarizing some aspects of serrated and non-serrated inhomogeneous flow—a phenomenon that has perplexed materials scientists for decades. Four directions of research are identified that emerged out of the desire to fundamentally understand the intermittent inhomogeneous flow response. These research directions gear away from the phenomenological stress–strain behavior but put the underlying shear defect into focus. Unsolved problems and future research topics are discussed.

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