TY - JOUR
T1 - An investigation of a new near-beta forging process for titanium alloys and its application in aviation components
AU - Zhou, Y. G.
AU - Zeng, W. D.
AU - Yu, H. Q.
PY - 2005/2/25
Y1 - 2005/2/25
N2 - In this paper, the authors present a new near-beta forging process, in which materials are heated at about 15 °C below the beta transus, to improve the combined properties of titanium alloys. Materials processed by the near-beta forging process, followed by rapid water-cooling, then high temperature toughening and low temperature strengthening heat treatments, produce a new kind of microstructure for titanium alloys. This new tri-modal microstructure consists of about 15% equiaxed alpha, 50-60% lamellar alpha and transformed beta matrix. Materials with tri-modal microstructure show a high low cycle fatigue property, high creep-fatigue interaction life, high fracture toughness and a high service temperature without decreasing ductility and thermal stability. The experimental fundamentals of the new process and the strengthening and toughening mechanism have been discussed. A critical issue in the practical application of the near-beta forging process is the control of temperature. A new metallographic inspection method was proposed to solve this problem. This new near-beta forging process has been reliably applied to produce several aeroengine compressor disks, rotators, and other airplane components.
AB - In this paper, the authors present a new near-beta forging process, in which materials are heated at about 15 °C below the beta transus, to improve the combined properties of titanium alloys. Materials processed by the near-beta forging process, followed by rapid water-cooling, then high temperature toughening and low temperature strengthening heat treatments, produce a new kind of microstructure for titanium alloys. This new tri-modal microstructure consists of about 15% equiaxed alpha, 50-60% lamellar alpha and transformed beta matrix. Materials with tri-modal microstructure show a high low cycle fatigue property, high creep-fatigue interaction life, high fracture toughness and a high service temperature without decreasing ductility and thermal stability. The experimental fundamentals of the new process and the strengthening and toughening mechanism have been discussed. A critical issue in the practical application of the near-beta forging process is the control of temperature. A new metallographic inspection method was proposed to solve this problem. This new near-beta forging process has been reliably applied to produce several aeroengine compressor disks, rotators, and other airplane components.
KW - Application
KW - Near-beta forging process
KW - Titanium alloys
KW - Tri-modal microstructure
UR - https://www.scopus.com/pages/publications/13344249751
U2 - 10.1016/j.msea.2004.10.016
DO - 10.1016/j.msea.2004.10.016
M3 - 文章
AN - SCOPUS:13344249751
SN - 0921-5093
VL - 393
SP - 204
EP - 212
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 1-2
ER -