Investigation of dynamic and static restoration in hot heformation of SP-700 titanium alloy

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SHEIKHALI AMIR HOSEIN; Morakkabati Maryam; ABBASI SEYED MAHDI

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Journal: Journal of Advanced Processes in Materials Engineering Year:2019 | Volume:13 | Issue:2 (49) Page(s): 45-62

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Information Journal Paper

Title

Investigation of dynamic and static restoration in hot heformation of SP-700 titanium alloy

Author(s)

SHEIKHALI AMIR HOSEIN | Morakkabati Maryam | ABBASI SEYED MAHDI | Issue Writer Certificate

Keywords

SP-700 Titanium AlloyQ1

Hot Torsion TestQ1

Dynamic RecrystallizationQ1

Static RestorationQ1

Phase TransformationQ2

Abstract

In order to investigation of dynamic and Static Restoration of SP-700 alloy, in this study continuous and interrupted Hot Torsion Tests carried out at 850 and 1000º C at different pass-strains and inter-pass times. The dominant mechanism in hot deformation at 1000° C is Dynamic Recrystallization (DRX) and consequently the entire microstructure comprises equiaxed grains, whereas at 850° C serration and tanglement of the grain boundaries were observed. Nevertheless, the microstructure of sample twisted at 850° C, indicates the occurrence of DRX and the formation of very fine grains. The mechanism of the formation of recrystallized grains in the vicinity of grain boundaries and triple points is bulging. With an increase in pass-strain (ε =0. 5) at 1000° C, due to the increase in driving force for nucleation and growth of new grains, the kinetics of Static Restoration increases. In fact, at 850° C, in addition to Static Restoration there is another factor contributing in fractional softening which is β to α Phase Transformation.

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APA: Copy

SHEIKHALI, AMIR HOSEIN, Morakkabati, Maryam, & ABBASI, SEYED MAHDI. (2019). Investigation of dynamic and static restoration in hot heformation of SP-700 titanium alloy. ADVANCED PROCESSES IN MATERIALS, 13(2 (49) ), 45-62. SID. https://sid.ir/paper/172643/en

Vancouver: Copy

SHEIKHALI AMIR HOSEIN, Morakkabati Maryam, ABBASI SEYED MAHDI. Investigation of dynamic and static restoration in hot heformation of SP-700 titanium alloy. ADVANCED PROCESSES IN MATERIALS[Internet]. 2019;13(2 (49) ):45-62. Available from: https://sid.ir/paper/172643/en

IEEE: Copy

AMIR HOSEIN SHEIKHALI, Maryam Morakkabati, and SEYED MAHDI ABBASI, “Investigation of dynamic and static restoration in hot heformation of SP-700 titanium alloy,” ADVANCED PROCESSES IN MATERIALS, vol. 13, no. 2 (49) , pp. 45–62, 2019, [Online]. Available: https://sid.ir/paper/172643/en

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