The Effect of Nb/Ti Ratio on Hardness in High-Strength Ni-Based Superalloys
AbstractThe age-hardening behaviour and microstructure development of high strength Ni-based superalloys ABD-D2, D4, and D6 with varying Nb/Ti ratios have been studied. The studied alloys have large volume fractions and multimodal size distributions of the γ′ precipitates, making them sensitive to cooling conditions following solution heat treatment. Differential scanning calorimetry was conducted with a thermal cycle that replicated a processing heat treatment. The hardness of these alloys was subsequently evaluated by nanoindentation. The Nb/Ti ratio was not observed to influence the size and distribution of primary and secondary γ′ precipitates; however, the difference in those of tertiary γ′ and precipitate morphology were observed. The nanoindentation hardness for all alloys reduces once they have been solution-heat-treated. The alloys exhibited specific peak hardness. The alloy with the greatest Nb content was found to have the best increase in hardness among the alloys studied due to its large tertiary γ′ precipitate. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Hisazawa, H.; Terada, Y.; Adziman, F.; Crudden, D.J.; Collins, D.M.; Armstrong, D.E.; Reed, R.C. The Effect of Nb/Ti Ratio on Hardness in High-Strength Ni-Based Superalloys. Metals 2017, 7, 71.
Hisazawa H, Terada Y, Adziman F, Crudden DJ, Collins DM, Armstrong DE, Reed RC. The Effect of Nb/Ti Ratio on Hardness in High-Strength Ni-Based Superalloys. Metals. 2017; 7(3):71.Chicago/Turabian Style
Hisazawa, Hiromu; Terada, Yoshihiro; Adziman, Fauzan; Crudden, David J.; Collins, David M.; Armstrong, David E.; Reed, Roger C. 2017. "The Effect of Nb/Ti Ratio on Hardness in High-Strength Ni-Based Superalloys." Metals 7, no. 3: 71.