TY - JOUR
T1 - Relationship between fracture toughness and microstructure of Ti-6A1-2Sn-4Zr-2Mo alloy reinforced with TiB particles
AU - Wang, Lei
AU - Niinomi, Mitsuo
AU - Takahashi, Shiro
AU - Hagiwara, Masao
AU - Emura, Satoru
AU - Kawabei, Yoshkuni
AU - Sung-Joon, Kim
PY - 1999/5/15
Y1 - 1999/5/15
N2 - Ti-6A1-2Sn-4Zr-2Mo alloy matrix composites reinforced with various volume fractions of TiB particles were fabricated using the blended elemental powder method in the present study. The static and dynamic fracture toughness tests were carried out on the composites at room temperature in order to understand the fracture mechanism. The dynamic fracture toughness value is fairly smaller than the static fracture toughness value. The ratio of dynamic fracture toughness value to static fracture toughness value increases with increasing the volume fraction of TiB particles. The fracture toughness value increases with increasing the degree of crack deflection which is greater under static conditions than under dynamic conditions. The fraction of TiB particles on the fracture surface is greater in the specimen with greater volume fraction of TiB particles, and is greater under dynamic conditions than under static conditions. Since the debonding of TiB particles from the matrix and shearing of TiB particles occurs easily, the fracture toughness value of composites decreases with increasing the volume fraction of TiB particles.
AB - Ti-6A1-2Sn-4Zr-2Mo alloy matrix composites reinforced with various volume fractions of TiB particles were fabricated using the blended elemental powder method in the present study. The static and dynamic fracture toughness tests were carried out on the composites at room temperature in order to understand the fracture mechanism. The dynamic fracture toughness value is fairly smaller than the static fracture toughness value. The ratio of dynamic fracture toughness value to static fracture toughness value increases with increasing the volume fraction of TiB particles. The fracture toughness value increases with increasing the degree of crack deflection which is greater under static conditions than under dynamic conditions. The fraction of TiB particles on the fracture surface is greater in the specimen with greater volume fraction of TiB particles, and is greater under dynamic conditions than under static conditions. Since the debonding of TiB particles from the matrix and shearing of TiB particles occurs easily, the fracture toughness value of composites decreases with increasing the volume fraction of TiB particles.
KW - Blended elemental powder method
KW - Fracture toughness
KW - Microstructure
KW - TiB particles
KW - Titanium alloy composite
UR - http://www.scopus.com/inward/record.url?scp=0000299791&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000299791&partnerID=8YFLogxK
U2 - 10.1016/S0921-5093(98)01163-0
DO - 10.1016/S0921-5093(98)01163-0
M3 - Article
AN - SCOPUS:0000299791
VL - 263
SP - 319
EP - 325
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 2
ER -