Static and dynamic flexural behaviour of printed polylactic acid with thermal annealing: parametric optimisation and empirical modelling

Author(s):  
Niranjan Chikkanna ◽  
Shankar Krishnapillai ◽  
Velmurugan Ramachandran
2017 ◽  
Vol 3 (2) ◽  
pp. 67-75 ◽  
Author(s):  
Yuqing Gao ◽  
Olivier T. Picot ◽  
Han Zhang ◽  
Emiliano Bilotti ◽  
Ton Peijs

Author(s):  
Robert C. Rau ◽  
John Moteff

Transmission electron microscopy has been used to study the thermal annealing of radiation induced defect clusters in polycrystalline tungsten. Specimens were taken from cylindrical tensile bars which had been irradiated to a fast (E > 1 MeV) neutron fluence of 4.2 × 1019 n/cm2 at 70°C, annealed for one hour at various temperatures in argon, and tensile tested at 240°C in helium. Foils from both the unstressed button heads and the reduced areas near the fracture were examined.Figure 1 shows typical microstructures in button head foils. In the unannealed condition, Fig. 1(a), a dispersion of fine dot clusters was present. Annealing at 435°C, Fig. 1(b), produced an apparent slight decrease in cluster concentration, but annealing at 740°C, Fig. 1(C), resulted in a noticeable densification of the clusters. Finally, annealing at 900°C and 1040°C, Figs. 1(d) and (e), caused a definite decrease in cluster concentration and led to the formation of resolvable dislocation loops.


2003 ◽  
Vol 27 (11) ◽  
pp. 1083-1086 ◽  
Author(s):  
H. Ito ◽  
T. Kusunoki ◽  
H. Saito ◽  
S. Ishio

Author(s):  
Satoshi Taniguchi ◽  
Norihiko Yamaguchi ◽  
Takao Miyajima ◽  
Masao Ikeda

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