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- Title
Metallurgical Characterization and Analysis of Locally Melted C-103(Nb-10Hf-1Ti) Sheet During Vacuum Heat Treatment.
- Authors
Kumar, Ravi Ranjan; Tripathy, Debasis; Anoop, C. R.; Narayana Murty, S. V. S.; Tharian, K. Thomas; Alex, A.
- Abstract
During vacuum annealing of C-103 (Nb-10Hf-1Ti) sheets, local melting was noticed at the locations they were in contact with commercially pure titanium (CP-Ti) base sheet. On metallurgical analysis, it was noted that initially CP-Ti sheet reacted with the Inconel 600 tray, forming a series of low melting eutectics, below the annealing temperature of 1175 °C. The weight of C-103 charge experienced at the contact region between the bottom-most C-103 sheet with Inconel 600 gridded tray, where the eutectic reaction between CP-Ti and Inconel 600 occurred initially along with long annealing time, enabled interdiffusion of Ni, Cr, Ti, Nb and Hf, forming a eutectic mixture. Based on detailed metallurgical analysis, the reactions were established and the cause of melting was attributed to improper selection of base tray/sheet combination. Finally, it was recommended to use a Mo tray between Inconel 600 tray and CP-Ti sheet to overcome the problem.
- Subjects
HEAT treatment; EUTECTIC reactions; NIOBIUM alloys; EUTECTICS; INCONEL; METALLURGICAL analysis; SURFACE charging
- Publication
Journal of Failure Analysis & Prevention, 2022, Vol 22, Issue 4, p1787
- ISSN
1547-7029
- Publication type
Article
- DOI
10.1007/s11668-022-01473-y