scholarly journals Influence of Rare Earth Addition on Texture Development during Static Recrystallization and Mechanical Behaviour of Magnesium Alloy Sheets

2011 ◽  
Vol 702-703 ◽  
pp. 651-654
Author(s):  
Sang Bong Yi ◽  
Lilian Rayas ◽  
Stefanie Sandlöbes ◽  
Stefan Zaefferer ◽  
Dietmar Letzig ◽  
...  
Keyword(s):  
Rare Earth ◽  
Grain Growth ◽  
Static Recrystallization ◽  
Shear Bands ◽  
Rare Earth Addition ◽  
Axial Tensile ◽  
Sheet Formability ◽  
Cold Rolled ◽  
Basal Type

The role of rare earth addition on the microstructure and texture during recrystallization of cold rolled sheets is investigated by a comparative study of pure Mg, Mg-3Y and Mg1.5Nd sheets. In pure Mg, nucleation occurs mainly at shear bands which results in a texture weakening. The basal-type texture re-strengthens rapidly during grain growth of the pure Mg sheet. In contrast, in the Mg-RE alloys the weaker texture formed during early recrystallization strage is retained during further annealing due to retarded grain growth. Uni-axial tensile and Erichsen tests show that ductility and sheet formability are significantly improved by addition of rare earth elements.

scholarly journals Microstructural Evolution during Recrystallization of Magnesiun Alloys

2012 ◽  
Vol 706-709 ◽  
pp. 1291-1296 ◽  
Author(s):  
Sang Bong Yi ◽  
Jan Bohlen ◽  
Stefanie Sandlöbes ◽  
Stefan Zaefferer ◽  
Dietmar Letzig ◽  
...  
Keyword(s):  
Grain Growth ◽  
Microstructural Evolution ◽  
Shear Bands ◽  
Rolling Direction ◽  
Sheet Rolling ◽  
Significant Difference ◽  
Basal Pole ◽  
Cold Rolled ◽  
Basal Type ◽  
Weak Texture

Microstructural evolution during the annealing of cold rolled Mg, Mg-1.5Nd and Mg-3Y sheets has been examined. The experimental results show a significant difference in recrystallization kinetics and grain growth between pure Mg and Mg-RE alloy sheets. Pure Mg sheet shows rapid recrystallization and grain growth, whereas recrystallization is considerably retarded in the Mg-RE alloys. Although recrystallized grains which are triggered at shear bands in the cold rolled pure Mg sheet show a relatively weak texture with a basal pole split into the sheet rolling direction, rapid grain growth is accompanied by re-strengthening of the basal-type texture. In contrast, a weak texture appears in the early recrystallization stage in Mg-RE alloys and is retained during annealing due to retarded recrystallization and grain growth.

scholarly journals Static recrystallization behaviour of cold rolled Mg-Zn-Y alloy and role of solute segregation in microstructure evolution

2017 ◽  
Vol 136 ◽  
pp. 41-45 ◽  
Author(s):  
Young Min Kim ◽  
Chamini Mendis ◽  
Taisuke Sasaki ◽  
Dietmar Letzig ◽  
Florian Pyczak ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Static Recrystallization ◽  
Solute Segregation ◽  
Cold Rolled

Modelling the Influence of Cementite on Static Recrystallisation in Cold-Rolled Low-Carbon Steels

2007 ◽  
Vol 550 ◽  
pp. 595-600 ◽  
Author(s):  
Carlos Capdevila ◽  
Tommy De Cock ◽  
Francisca García Caballero ◽  
Carlos García de Andrés
Keyword(s):  
Grain Growth ◽  
Annealing Temperature ◽  
Carbon Steels ◽  
Second Phase ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Second Phase Particles ◽  
Theoretical Predictions ◽  
Cold Rolled

In this work the prominent influence of Particle Stimulated Nucleation (PSN) on the overall process of nucleation and subsequent grain growth is discussed and a global recrystallisation kinetics model is proposed. This model accounts for the effect of the most relevant industrial parameters, such as cold reduction and annealing temperature. Moreover, not only the role of the cementite content, which is function of the nominal carbon content, is included in the model, but also the morphology of the second phase particles. Experimental evidence is given to ascertain the accuracy of the theoretical predictions.

Improvement of Magnesium Sheet Formability by Alloying Addition of Rare Earth Elements

2010 ◽  
Vol 638-642 ◽  
pp. 1506-1511 ◽  
Author(s):  
Sang Bong Yi ◽  
Dietmar Letzig ◽  
Kerstin Hantzsche ◽  
Rodolfo Gonzalez Martinez ◽  
Jan Bohlen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Crystallographic Texture ◽  
Large Strain ◽  
Rolling Direction ◽  
Alloy Sheet ◽  
Texture Intensity ◽  
Sheet Formability ◽  
Dynamic Recrystallisation ◽  
Cold Rolled

The influences of rare earth elements addition on the crystallographic texture and microstructural evolutions are examined during rolling and annealing of Mg-sheets. In case of Nd or Y additions, dynamic recrystallisation is suppressed such that the deformed microstructure is observed after hot rolling with relatively large strain per pass. Cold rolled binary Mg-Nd alloy sheet shows strong texture with splitting of the basal poles in the rolling direction, however, the texture intensity decreases significantly during the recrystallisation annealing. From the comparison of deep drawing behaviours between commercial ZE10 and AZ31 sheets, it is observed that the addition of the rare earth elements and accompanying texture changes result in the improved formability.

THE PROVENANCE OF WINE: THE ROLE OF BEDROCK AND SOIL IN TRANSFERRING TRACE AND RARE EARTH ELEMENTS INTO WINE GRAPES, SONOMA COUNTY, CA

2019 ◽  
Author(s):  
Kylie E. Dupuis ◽  
◽  
Owen A. Anfinson ◽  
Laura Waters ◽  
Holli M. Frey ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Wine Grapes ◽  
Sonoma County
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