Effect of solution treatment and aging on microstructure and tensile properties of high strength β titanium alloy, Ti–5Al–5V–5Mo–3Cr. (5th February 2015)

• Record Type: Journal Article
• Authors: Shekhar, Shashi; Sarkar, Rajdeep; Kar, Sujoy Kumar; Bhattacharjee, Amit
• Is Part Of: Materials & design. Volume 66:Part B(2015:Feb.)
• Page Start: 596
• Page End: 610
• Publication Date: 2015-02-05
• Subjects: Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2014.04.015
• Languages: English
• ISSNs: 0264-1275

Abstract

Highlights: Alloy was double melted in vacuum arc and then it was thermo-mechanically processed. Microstructure was determined as a function of solution treatment and aging (STA). Tensile properties were determined as function of β and α + β STA. β STA resulted in higher strength in compared to α + β STA. α + β STA resulted in optimum condition strength and ductility. Abstract: Ti–5Al–5V–5Mo–3Cr is one of the latest high strength β titanium alloys to be used for larger size components in aircraft structures replacing Ti–10V–2Fe–3Al. In the present study, a double VAR melted ingot was thermo-mechanically processed and it's microstructure and tensile properties determined as a function of β as well as α + β solution treatment and aging. The β solution treatment and aging resulted in higher strength and α + β solution treatment and aging resulted in an optimum combination of strength and ductility. Its aging behavior was studied as a function of time and temperature and corresponding microstructure as well as fractographs of tensile tested specimens were recorded. This systematic study should help in further modeling its mechanical behavior.