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Abstract：
The fracture toughness of Ti-48Al-2Mn-2Nb produced by centrifugal spray deposition (CSD) under a low pressure vacuum condition and treated by hot isostatic pressing (HIP) at 1 250 degrees C has been investigated at ambient temperature using the three-point bending test. The results show that the mean value of fracture toughness is approximately 23.6 MPa m 1/2 and the maximum of fracture toughness reaches 28 MPa m 1/2 for the CSD sample, while only 15.3 MPa m 1/2 for the HIP sample. The CSD sample has a finer lamellar structure, but the microstructure of the HIP sample is a duplex structure of lamellar and equiaxed gamma grains, for which reason the much better fracture toughness the sample. The lamellar structure also has better resistance to crack growth than equiaked gamma grains.
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RARE METAL MATERIALS AND ENGINEERING
ISSN： 1002-185X
CN： 61-1154/TG
Year： 2000
Issue： 1
Volume： 29
Page： 17-20
0 . 2 4 2
JCR@2000
0 . 6 0 0
JCR@2023
ESI Discipline： MATERIALS SCIENCE;
JCR Journal Grade：3
Cited Count：
WoS CC Cited Count： 4
SCOPUS Cited Count：
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 3
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