TY - JOUR
T1 - Study into laser heating of Ti14Al21Nb alloy to improve properties
AU - Yilbaş, Bekir S.
AU - Şahin, Ahmet Z.
AU - Sami, M.
AU - Çoban, Ali
AU - Bozdoǧan, R.
PY - 1995
Y1 - 1995
N2 - Ti14Al21Nb alloy may find a potential application in advanced structures. On the other hand, incompatible atomic configurations at the grain boundaries render the grain boundary regions weak, which, in turn, provides possible crack development and propagation along these boundaries, i.e. due to room temperature slip behaviour of intermetallic alloys, nucleation and propagation of cracks become the mode of deformation. Considerable research has been carried out to solve the poor ductility of intermetallic alloy knowing the fact that altering the crystal structure and reducing slip distance by creating a small grain size structure may be one way of solving the problem. Consequently, laser heating at pulses 1 μs can provide a cooling rate of the order of 106 K/s, which, in turn, makes it possible to change the metallurgical structure of the alloy to a desired structure. In the present study, a theoretical model based on Fourier analysis is carried out to predict the cooling rate after the laser pulse irradiation. An experiment is carried out to measure the cooling rate. The study is extended to include experimental investigation into metallurgical changes due to laser pulse.
AB - Ti14Al21Nb alloy may find a potential application in advanced structures. On the other hand, incompatible atomic configurations at the grain boundaries render the grain boundary regions weak, which, in turn, provides possible crack development and propagation along these boundaries, i.e. due to room temperature slip behaviour of intermetallic alloys, nucleation and propagation of cracks become the mode of deformation. Considerable research has been carried out to solve the poor ductility of intermetallic alloy knowing the fact that altering the crystal structure and reducing slip distance by creating a small grain size structure may be one way of solving the problem. Consequently, laser heating at pulses 1 μs can provide a cooling rate of the order of 106 K/s, which, in turn, makes it possible to change the metallurgical structure of the alloy to a desired structure. In the present study, a theoretical model based on Fourier analysis is carried out to predict the cooling rate after the laser pulse irradiation. An experiment is carried out to measure the cooling rate. The study is extended to include experimental investigation into metallurgical changes due to laser pulse.
UR - https://www.scopus.com/pages/publications/0029223504
U2 - 10.1016/0143-8166(94)00022-3
DO - 10.1016/0143-8166(94)00022-3
M3 - Article
AN - SCOPUS:0029223504
SN - 0143-8166
VL - 23
SP - 53
EP - 64
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
IS - 1
ER -