The Role of Mesoscopic Deformation Heterogeneities in Plastic Flow and Recrystallization of a Magnesium Sheet Alloy

2020 ◽  
Author(s):  
Risheng Pei ◽  
Sandra Korte-Kerzel ◽  
Talal Al-Samman
Keyword(s):  
Plastic Flow ◽  
Magnesium Sheet ◽  
Sheet Alloy

The role of mesoscopic deformation heterogeneities in plastic flow and recrystallization of a magnesium sheet alloy

Materialia ◽  
2020 ◽  
Vol 12 ◽  
pp. 100715 ◽  
Author(s):  
Risheng Pei ◽  
Sandra Korte-Kerzel ◽  
Talal Al-Samman
Keyword(s):  
Plastic Flow ◽  
Magnesium Sheet ◽  
Sheet Alloy

The Role of Plastic Flow by Dislocation Motion in the Sintering of Calcium Fluoride

1969 ◽  
pp. 375-391 ◽  
Author(s):  
A. R. Hingorany ◽  
F. V. Lenel ◽  
G. S. Ansell
Keyword(s):  
Plastic Flow ◽  
Calcium Fluoride ◽  
Dislocation Motion

scholarly journals Stress-state dependent fracture characterisation and modelling of an AZ31 magnesium sheet alloy at elevated temperatures

2019 ◽  
Vol 29 ◽  
pp. 450-457 ◽  
Author(s):  
Bernd-Arno Behrens ◽  
Alexander Chugreev ◽  
Matthäus Dykiert
Keyword(s):  
Stress State ◽  
Elevated Temperatures ◽  
Magnesium Sheet ◽  
Sheet Alloy ◽  
State Dependent

scholarly journals A new magnesium sheet alloy and its multi-stage homogenization for simultaneously improved ductility and strength at room temperature

2019 ◽  
Vol 171 ◽  
pp. 92-97 ◽  
Author(s):  
Renhai Shi ◽  
Jiashi Miao ◽  
Alan A. Luo
Keyword(s):  
Room Temperature ◽  
Magnesium Sheet ◽  
Sheet Alloy ◽  
Multi Stage

scholarly journals From plastic flow to brittle fracture: Role of microscopic friction in amorphous solids

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
Kamran Karimi ◽  
David Amitrano ◽  
Jérôme Weiss
Keyword(s):  
Brittle Fracture ◽  
Plastic Flow ◽  
Amorphous Solids

Distinct role of eutectic morphology on the plastic flow in cast Mg–3Ca alloy

2020 ◽  
Vol 791 ◽  
pp. 139633
Author(s):  
N.T.B.N. Koundinya ◽  
Ravi Sankar Kottada
Keyword(s):  
Plastic Flow ◽  
Eutectic Morphology ◽  
Distinct Role

On the Cutting of Metals: A Mechanics Viewpoint

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Dinakar Sagapuram ◽  
Anirudh Udupa ◽  
Koushik Viswanathan ◽  
James B. Mann ◽  
Rachid M’Saoubi ◽  
...  
Keyword(s):  
Plastic Flow ◽  
Chip Formation ◽  
Metal Cutting ◽  
Large Strain ◽  
Shear Banding ◽  
Continuous Shear ◽  
Recent Developments ◽  
Flow Phenomena ◽  
The Stability

Abstract The mechanics of large-strain deformation in cutting of metals is discussed, primarily from viewpoint of recent developments in in situ analysis of plastic flow and microstructure characterization. It is shown that a broad range of deformation parameters can be accessed in chip formation—strains of 1–10, strain rates of 10–105/s, and temperatures up to 0.7Tm—and controlled. This range is far wider than achievable by any other single-stage, severe plastic deformation (SPD) process. The resulting extreme deformation conditions produce a rich variety of microstructures in the chip. Four principal types of chip formation—continuous, shear-localized, segmented, and mushroom-type—as elucidated first by Nakayama (1974, “The Formation of ‘Saw-Toothed Chip’ in Metal Cutting,” Proceedings of International Conference on Production Engineering, Tokyo, pp. 572–577) are utilized to emphasize the diverse plastic flow phenomena, especially unsteady deformation modes that prevail in cutting. These chip types are intimately connected with the underlying flow, each arising from a distinct mode and triggered by an instability phenomenon. The role of plastic flow instabilities such as shear banding, buckling, and fracture in mediating unsteady flow modes is expounded, along with consequences of the flow modes and chip types for the cutting. Sinuous flow is shown to be the reason why gummy (highly strain-hardening) metals, although relatively soft, are so difficult to cut. Synthesizing the various observations, a hypothesis is put forth that it is the stability of flow modes that determines the mechanics of cutting. This leads to a flow-stability phase diagram that could provide a framework for predicting chip types and process attributes.

scholarly journals The role of quench rate on the plastic flow and fracture of three aluminium alloys with different grain structure and texture

2020 ◽  
Vol 150 ◽  
pp. 103257 ◽  
Author(s):  
Bjørn Håkon Frodal ◽  
Emil Christiansen ◽  
Ole Runar Myhr ◽  
Odd Sture Hopperstad
Keyword(s):  
Plastic Flow ◽  
Aluminium Alloys ◽  
Grain Structure ◽  
Quench Rate
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