Superplastic hemispherical Bulge Forming of a Ti-Al-Mn Alloy
نویسنده
چکیده
Superplastic sheet thermoforming has been identified as a standard processing route for the production of complex shapes, especially in the aerospace industry. Ti-Al-Mn (OT4-1) alloy is currently being used for aero engine components as well as other aerospace applications by forming through a conventional route which is typically cost, labour and equipment intensive. The Ti-Al-Mn alloy (made as per the Russian specification, OT4-1) is a candidate material for aerospace applications. However, there is virtually little or no information available on its superplastic forming behavior. In this paper the superplastic deformation capability of the Ti-Al-Mn alloy was studied. Sheets of 1 mm thickness were successfully bulge formed to a hemispherical component of 90 mm diameter using a sheet thermoforming route. Index Terms — Ti-Al-Mn (OT4-1) alloy, superplastic forming, bulge forming, forming pressure. —————————— ——————————
منابع مشابه
تحلیل ابعادی شکل دهی سازه نیم کُروی از آلیاژ تیتانیوم 4-6، به روش هیدرواستاتیک-سوپرپلاستیک
Experimental tests on superplastic forming of alloy Ti-6Al-4V with large dimensions can be quite difficult and expensive. In order to avoid the expense of manufacturing alloy sections, numerical modelling is used to simulate the alloy’s superplastic behaviour. However the results obtained from the numerical modelling need to be verified against experimental tests. In order to reduce the expense...
متن کاملTowards Superplastic Forming of Az31 Magnesium Alloy with Controlled Microstructure
A recent study on post-superplastic forming properties has shown that heating time prior to testing has a major effect on the post-forming properties of superplastically-formed AZ31 Magnesium alloy sheets. To this point, there has been very little examination into the effects of pre-heating or annealing on superplastic forming. In this work, these effects are examined using AZ31 Mg alloy sample...
متن کاملOptimization of Superplastic Forming Technology
The objective of this paper is a superplastic forming (SPF) technologies design and optimization. The conditions of superplasticity are very sensitive to strain rates and temperature characteristic of deformation process. The presented work gives an approach to design the SPF technologies that satisfies such conditions.A possibility to decrease the temperature of the industrial forming of the T...
متن کاملOn the Optimisation of Superplastic Free Forming Test of an AZ31 Magnesium Alloy Sheet
This paper presents a comparison between a number of different failure prediction methods forsuperplastic forming processes. Attention is limited here to superplastic forming of Ti-6Al-4V at 927C. Thefailure prediction methods considered include the flow localisation factor approach, forming limit curvesbased on void growth models, such as the Rice and Tracey model and the Cocks and...
متن کاملInvestigating the Effects of Cold Bulge Forming Speed on Thickness Variation and Mechanical Properties of Aluminum Alloys: Experimental and Numerical
In this work, cold bulge forming of an Aluminium-Magnesium (Al-Mg) sheet with a solid bulging medium is performed experimentally and numerically. Mechanical properties and thickness variations of Al-Mg sheet are evaluated before and after the forming process. The results indicated that the Al-Mg sheet has taken the desired shape without necking using the cold bulge forming process. Also, the...
متن کامل