TY - JOUR
T1 - An investigation of high-temperature deformation strengthening and toughening mechanism of titanium alloy
AU - Zhou, Yigang
AU - Zeng, Weidong
AU - Li, Xiaoqin
AU - Yu, Hanqing
AU - Cao, Chunxiao
PY - 1999/1
Y1 - 1999/1
N2 - The high-temperature deformation strengthening and toughening mechanisms have been investigated. It is found that equiaxed alpha phases in tri-modal microstructure have no inherent orientaion with transformed beta matrix, dislocations can easily find their slip plane, so they give coordination of materials' deformation, and result in higher ductility. The striature alpha phases not only increase the strength and creep properties, but also change the cracks' propagation directions, thus cracks make a more winding way along or cross grain boundary between striature alpha phases, and materials show a higher fracture toughness. This new deformation theory applies to α, near α, (α+β) and β titanium alloys.
AB - The high-temperature deformation strengthening and toughening mechanisms have been investigated. It is found that equiaxed alpha phases in tri-modal microstructure have no inherent orientaion with transformed beta matrix, dislocations can easily find their slip plane, so they give coordination of materials' deformation, and result in higher ductility. The striature alpha phases not only increase the strength and creep properties, but also change the cracks' propagation directions, thus cracks make a more winding way along or cross grain boundary between striature alpha phases, and materials show a higher fracture toughness. This new deformation theory applies to α, near α, (α+β) and β titanium alloys.
KW - High-temperature deformation
KW - Strengthening and toughening mechanism
KW - Titanium alloy
KW - Tri-modal microstructure
UR - http://www.scopus.com/inward/record.url?scp=0041763374&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:0041763374
SN - 0412-1961
VL - 35
SP - 45
EP - 48
JO - Jinshu Xuebao/Acta Metallurgica Sinica
JF - Jinshu Xuebao/Acta Metallurgica Sinica
IS - 1
ER -