Reviewer's comments:
I have just one comment or question regarding the high strength being attributed to the coarse grain size of the Ti3Al. One would expect larger cracks to be produced in larger coarse grained brittle material and thus lower strength.
Statement extracted from the manuscript:
The high strength is attributed to the coarse grain size (~70 μm) of Ti3Al in the laminated composites, compared with previous studies (~15μm).
Materials: Ti-Ti3Al laminated composites
Tensile temperature: 600oC
Question: At elevated tempeartures, the strength of coarse-grained hcp-Ti3Al is higher than that of fine-grained counterpart. Why? grain boundary softening?
Thanks for your kind reply. Indeed, the brittleness of Ti3Al is due to its ordering lattice and hcp crystal structure. I just want to know the strength difference between fine- and coarse-grained Ti3Al at 600℃. It is also important to note that the magnitude of T/Tm is close to 0.47.
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