Recovery and Recrystallization as a Function of Deformed Microstructure Orientation in Coarse Grained Cold-Rolled Ni

2007 ◽  
Vol 558-559 ◽  
pp. 149-152
Author(s):  
H.S. Chen ◽  
Andrew Godfrey ◽  
Niels Hansen ◽  
Qing Liu
Keyword(s):  
Grain Size ◽  
Crystal Orientation ◽  
Electron Backscatter Diffraction ◽  
Rolling Texture ◽  
Coarse Grained ◽  
Localized Deformation ◽  
Orientation Mapping ◽  
Average Grain Size ◽  
Cold Rolled ◽  
Backscatter Diffraction

The effect of crystal orientation on the recovery and recrystallization of cold-rolled Ni (99.96% purity) has been investigated. Particular attention was paid to the annealing response of regions with either the Copper (C), Brass (B) or S rolling texture orientations. Samples with an initial average grain size of approx. 500μm were deformed to strains of up to εvM = 4.5. As a result of the large initial grain size, even after high rolling reductions it is possible to find sufficiently large regions of material with similar crystal orientation to analyze the recovery and recrystallization behaviour as a function of crystal orientation. Microstructural investigations were carried out in the scanning electron microscope using both electron channeling contrast and electron backscatter diffraction orientation mapping. Both the S and C orientation regions exhibit a heterogeneous microstructure containing bands of localized deformation. The presence of volumes surrounded by high angle boundaries in these regions strongly influences both the recovery and recrystallization behaviour of the material. Twinning was observed also to play an important role in the generation of recrystallized grains, with twin chains of up to 3 generations being observed.

scholarly journals Evolution of Recrystallized Grain and Texture of Cold-Drawn Pure Mg Wire and Their Effect on Mechanical Properties

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 427
Author(s):  
Jiao Meng ◽  
Liuxia Sun ◽  
Yue Zhang ◽  
Feng Xue ◽  
Chenglin Chu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Texture Component ◽  
Crystal Orientation ◽  
Electron Backscatter Diffraction ◽  
Hardness Test ◽  
Orientation Distribution ◽  
Recrystallization Annealing ◽  
Average Grain Size ◽  
Backscatter Diffraction

Static recrystallization plays a key role in the fabrication of thin Mg wires as well as the mechanical properties of the final wires. The effect of annealing parameters on the evolution of the microstructures, textures and mechanical properties of cold-drawn pure Mg wire was studied by means of optical microscopy (OM), electron backscatter diffraction (EBSD), a tensile test and a hardness test. This study shows that the mechanical properties of as-annealed pure thin Mg wire is affected not only by the average grain size, but also the uniformity of the recrystallization grains, including the uniformity of grain size and crystal orientation distribution (more random texture component). With increasing annealing temperature and time, the uniformity of recrystallization grain size first improved and then declined after obvious grain growth. At the same time, the randomness of the basal texture component declined with the development of recrystallization. Annealing at 300 °C for 30 min caused the most uniform grain size and orientation distribution in the microstructures, thus contributing to the best plasticity among all experimental wires. It is reasonable to conclude that more uniform and regular recrystallized grains and a more randomly distributed crystal orientation would be benefit for the mechanical properties of Mg wires.

Effect of Annealing Time on the Microstructure and Texture of Interstitial Free Steel

2012 ◽  
Vol 535-537 ◽  
pp. 593-596
Author(s):  
Zhi Fen Wang ◽  
Rong Dong Han ◽  
Shun Bing Zhou ◽  
Zhong Hai Yao ◽  
Li Xin Wu
Keyword(s):  
Grain Size ◽  
Annealing Time ◽  
Electron Backscatter Diffraction ◽  
Recrystallization Process ◽  
Interstitial Free ◽  
X Ray Diffraction ◽  
Steel Sheets ◽  
Grain Boundary Character ◽  
Average Grain Size ◽  
Backscatter Diffraction

Effect of annealing time on the microstructure and texture of IF steel sheets was investigated. Average grain size, grain boundary character and recrystallization texture were measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) in order to clarify the effect of annealing time on microstructure of recrystallization process. The average grain size increased with increasing annealing time. With rising annealing time, the number of low angle boundary (0～15o) decreased due to the mergence of grain with sub-boundary. The //ND (-fiber) pole intensity had a highest value annealed at 60s. The annealing time played an important role in recrystallization process which affected the mechanical properties and microstructure of IF steels.

Effect of Ti3Si on Texture in Ti-Nb Based Shape Memory Alloys

2006 ◽  
Vol 980 ◽  
Author(s):  
Ryutaro Shimizu ◽  
Kei Masumoto ◽  
Yusuke Fukui ◽  
Tomonari Inamura ◽  
Kenji Wakashima ◽  
...  
Keyword(s):  
Grain Size ◽  
Recrystallization Texture ◽  
Electron Backscatter Diffraction ◽  
Boundary Migration ◽  
Solution Treatment ◽  
Rolling Texture ◽  
Β Phase ◽  
Solution Treated ◽  
Average Grain Size ◽  
Si Content

AbstractEffect of Ti3Si particles on recrystallization texture of Ti-Nb based superelastic alloys has been investigated using X-ray pole figure measurement and electron backscatter diffraction (EBSD) technique. The alloys used were Ti-24mol%Nb-3mol%Al-Xmol%Si (X=0~0.9, termed XSi) and Ti-24mol%Nb-3mol%Si alloy (termed 3Si). The apparent phase at room temperature was β-phase (bcc). Besides, (Ti, Nb)3Si particles with PTi3 type crystal structure were formed in the alloys with Si content higher than 0.7mol%. After the cold rolling of 99% reduction in thickness, a rolling texture of the β-phase was formed to be mainly {001}β<110>β regardless of the presence of the (Ti, Nb)3Si particles. After the solution treatment at 1273K, a recrystallization texture formed to be {112}β<110>β in all the alloys except for 3Si. The average grain size of the recrystallized alloys was 20~40μm. On the other hand, the solution treated 3Si exhibited the {001}β<110>βn texture and the average grain size of 3μm. It is concluded that the {001}β<110>β texture with fine grains of the solution treated 3Si is obtained by the suppression of grain boundary migration due to the existence of the (Ti, Nb)3Si particles.

Characterization of Nanostructured Electrodeposited NiCo Samples by use of Electron Backscatter Diffraction (EBSD)

2005 ◽  
Vol 880 ◽  
Author(s):  
Alice Bastos ◽  
Dierk Raabe ◽  
Stefan Zaefferer ◽  
Christopher Schuh
Keyword(s):  
Grain Size ◽  
Cross Sections ◽  
Electron Backscatter Diffraction ◽  
Growth Direction ◽  
Grain Structure ◽  
Local Texture ◽  
Average Grain Size ◽  
Electron Backscatter ◽  
Backscatter Diffraction

AbstractA Cobalt-20wt.% Nickel polycrystal produced by electrodeposition has been investigated in planar and cross sections using a high resolution scanning electron microscope. The local texture, grain size, amount of phase and grain boundaries, were characterized by Electron Backscatter Diffraction (EBSD). The average grain size perpendicular to the grain growth direction was 400 nm. Parallel to it, a pronounced bimodal grain structure was observed with grains reaching more than 10 μm and grains of approximately 800 nm diameter.

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