Paper Title:
Effects of Heat Treatment on Microstructures and Properties of Ti811 Alloys
  Abstract

Mechanical properties and microstructures of Ti811 alloys under different heat treatment conditions were studied. The results show that the microstructures of Ti811 alloy consist of α, massive β and grain-boundary β after normal annealing. The intensity and hardness decreased, while the ductility increased. After double annealing, the primary phase α reduced and needle-like secondary α〞 was formed. The massive β and grain-boundary β changed into intergranular β gradually. The microstructure was relatively uniform. Then the intensity and hardness increased, the ductility decreased when compared to general annealing. The needle-like secondary α〞and metastable β would break down into dispersed α and β after solution hardening and aging. The combination properties of alloys would be improved. According to fractography of titanium alloy, the fracture mechanism of the Ti811 alloy was dissociation - brittle intergranular fracture, which was a type of fracture between the intergranular fracture of brittle and cleavage fracture.

  Info
Periodical
Chapter
Chapter 6: New Materials and Advanced Materials
Edited by
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
Pages
1032-1035
DOI
10.4028/www.scientific.net/AMM.117-119.1032
Citation
H. G. Wang, F. Wang, Y. P. Song, "Effects of Heat Treatment on Microstructures and Properties of Ti811 Alloys", Applied Mechanics and Materials, Vols. 117-119, pp. 1032-1035, 2012
Online since
October 2011
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Price
$32.00
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