Microstructural evolution and hardness response in the laser beam welded joints of pure titanium during recrystallization and grain growth

2018 ◽  
Vol 145 ◽  
pp. 87-95 ◽  
Author(s):  
H. Liu ◽  
J. Shui ◽  
T. Cai ◽  
Q. Chen ◽  
X.G. Song ◽  
...  
Keyword(s):  
Laser Beam ◽  
Grain Growth ◽  
Microstructural Evolution ◽  
Welded Joints ◽  
Pure Titanium ◽  
Hardness Response

Microstructural evolution of fusion zone in laser beam welds of pure titanium

2012 ◽  
Vol 65 ◽  
pp. 1-7 ◽  
Author(s):  
H. Liu ◽  
K. Nakata ◽  
J.X. Zhang ◽  
N. Yamamoto ◽  
J. Liao
Keyword(s):  
Laser Beam ◽  
Fusion Zone ◽  
Microstructural Evolution ◽  
Pure Titanium

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

Microstructural evolution at large driving forces during grain growth of ultrafine-grained Ni–1.2wt%P

1992 ◽  
Vol 131 (2) ◽  
pp. 569-575 ◽  
Author(s):  
D. Osmola ◽  
P. Nolan ◽  
U. Erb ◽  
G. Palumbo ◽  
K. T. Aust
Keyword(s):  
Grain Growth ◽  
Microstructural Evolution ◽  
Driving Forces ◽  
Ultrafine Grained

Substrates with Programmable Heater Arrays for In-Situ Observation of Microstructural Evolution of Polycrystalline Films: Towards Real Time Control of Grain Growth

MRS Advances ◽  
2016 ◽  
Vol 1 (26) ◽  
pp. 1947-1952 ◽  
Author(s):  
Prabhu Balasubramanian ◽  
Chengjian Zheng ◽  
Yixuan Tan ◽  
Genevieve Kane ◽  
Antoinette Maniatty ◽  
...  
Keyword(s):  
Grain Growth ◽  
Microstructural Evolution ◽  
Control Strategies ◽  
Experimental Simulation ◽  
In Situ Observation ◽  
Temperature Profiles ◽  
Theory Approach ◽  
Polycrystalline Films ◽  
Real Time Control

ABSTRACTAn integrated experimental – simulation – control theory approach designed to enable adaptive control of microstructural evolution in polycrystalline metals is described. A micro-heater array, containing ten addressable channels, is used to create desired temperature profiles across thin polycrystalline films in situ to a scanning electron microscope (SEM). The goal is that on heating with controlled temperature profiles, the evolution of grain growth within the film can be continuously monitored and compared to Monte Carlo simulations of trajectories towards a desired microstructure. Feed-forward and feedback control strategies are then used to guide the microstructure along the desired trajectory.

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