期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.04.060
关键词
High temperature alloys; Mechanical properties; Diffusion; Dislocations; Energy filtered transmission electron; microscopy (EFTEM); Dynamic strain aging
类别
资金
- Defence Research and Development Organisation
Dynamic strain aging was observed in the temperature range between 300 degrees C and 500 degrees C in a near a titanium alloy 834 without Silicon (10.38%Al-0.16%Sn-1.86%Zr-0.37%Nb-0.25%Mo-0.27%C-0.30%O-0.006%N, all in at%) tested in the temperature range from room temperature to 500 degrees C. Electron microscopic investigation of tensile tested samples in an energy filtered transmission electron microscopy provided direct experimental evidence for segregation of interstitial elements like carbon (C) and nitrogen (N) to lath boundaries and dislocation pile ups. On the basis of these results and the comparison of lattice strain generated by different interstitials in alpha-Ti, it was concluded that segregation of carbon and nitrogen and not oxygen to defects is responsible for DSA in this alloy. (C) 2015 Elsevier B.V. All rights reserved.
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