Serrated flow behavior in a near alpha titanium alloy IMI 834

Prasad, Kartik; Varma, V.K.

doi:10.1016/j.msea.2007.09.020

Cited by 54 publications

(14 citation statements)

References 22 publications

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“…Other investigators have also found that Timetal 834 titanium alloys exhibit DSA in a similar temperature range under tensile loading. [26][27][28] The DSA in titanium alloys has been attributed to the interaction of the mobile dislocations with interstitial elements such as O, C, and N as well as substitutional solutes such as Si. [28,29] While the interstitial elements are the primary cause of DSA, Si, because of its smaller size compared to titanium atom, when present near an interstitial site, can change the symmetry of the spherical distortion around the interstitial atom, which enhances the strength of DSA.…”

Section: A Dynamic Strain Agingmentioning

confidence: 99%

Effect of Temperature on Fracture Toughness of Timetal 834 Titanium Alloy under Mode I and Mixed Mode I/III Loading

Rao

Srinivas

Kamat

2008

Metall Mater Trans A

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The effect of temperature on fracture toughness of Timetal 834 titanium alloy plate under mode I and mixed mode I/III loading was investigated. Both mode I and mixed mode I/III fracture toughness values were initially found to increase as the temperature is increased from room temperature to 723 K. Beyond this temperature, both the fracture toughness values decreased up to 773 K and then showed a significant increase at 823 K. It was also observed that at room temperature, the fracture toughness under mixed mode I/III loading was higher than the corresponding mode I fracture toughness, whereas at 723, 748, and 773 K, the fracture toughness under mixed mode I/III loading was lower than the corresponding mode I fracture toughness, and at 823 K, the two toughness values were comparable. The results were explained on the basis of the occurrence of dynamic strain aging (DSA), change in fracture mechanism, and the nature of the deformation fields ahead of the crack tip under mode I and mixed mode I/III loading.

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Section: A Dynamic Strain Agingmentioning

confidence: 99%

Effect of Temperature on Fracture Toughness of Timetal 834 Titanium Alloy under Mode I and Mixed Mode I/III Loading

Rao

Srinivas

Kamat

2008

Metall Mater Trans A

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“…It can also affect the hardening rate of the material (Ren et al, 2017). DSA has been already observed in many experimental studies on (i) Aluminum alloys like Al-Mg (Clausen et al, 2004;Amokhtar et al, 2006;Halim et al, 2007;Reyne et al, 2019) and Al-Cu (Ranc and Wagner, 2005;Böhlke et al, 2009) at room temperature, (ii) Ferritic C-Mn steels (Wang et al, 2012;Ranc et al, 2016;Ren et al, 2020;Lee et al, 2021) at around 300 • C-400 • C, (iii) Titanium alloys at around 400 • C (Prasad and Varma, 2008;Marchenko et al, 2016), (iv) Cobalt-based superalloys at 600 • C (Cui et al, 2011;Chaboche et al, 2013;Mazière and Andrebo, 2015).…”

Section: Introductionmentioning

confidence: 89%

Experimental and numerical analysis of the Portevin–Le Chatelier effect in a nickel-base superalloy for turbine disks application

Guillermin

Besson

Köster

et al. 2023

International Journal of Solids and Structures

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“…(3) Si present in titanium alloys either in the form of substitutional solute atoms or in the form of silicide precipitates locks dislocations and retards cross-slip of dislocations on parallel slip planes [56][57][58][59][60]. Consequently, it is conceived that subgrain boundaries formation via cross-slips of dislocations during boundary splitting process is delayed.…”

Section: Comparison Of Static Spherodization Kinetics With Ti-6al-4vmentioning

confidence: 99%

Microstructure evolution and deformation texture during rolling of TIMETALⓇ 407

2020

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TIMETAL ® 407 (referred as Ti407 here afterwards) is a new titanium alloy primarily developed for combining high formability with improved strength compared to commercially pure titanium. In this study, the evolution of microstructure, spherodization behavior of α laths, macro and micro textures during rolling of Ti407 are examined. For this purpose, Ti407 with transformed β microstructure was rolled at 650 and 820 °C to 50 and 75% reduction ratios followed by recrystallization heat treatment at 820 °C. The material was characterized focusing on microstructure morphology and texture evolution. The material rolled at 650 °C displayed strong basal pole concentrations towards the normal direction (ND)/30° towards transverse direction (TD) together with a weak transverse component. When the material was rolled at higher temperature 820 °C, the texture only showed a weak transverse type texture. Complete spherodization of the α laths occurred only when the material was rolled to 75% reduction at 650 °C. At other rolling temperature and reduction ratios, the extent of spherodization per se was limited. Our results clearly show that activation of deformation twinning in the material rolled at 650 °C to 75% reduction played a key role in the break-up of α laths and significant texture change involving formation of strong 30 degree basal texture component. The spherodization behavior of α laths in Ti407 is compared with Ti-6Al-4V rolled to equivalent temperatures relative to the b-transus based on classical boundary splitting and termination migration mechanisms.

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Serrated flow behavior in a near alpha titanium alloy IMI 834

Cited by 54 publications

References 22 publications

Effect of Temperature on Fracture Toughness of Timetal 834 Titanium Alloy under Mode I and Mixed Mode I/III Loading

Effect of Temperature on Fracture Toughness of Timetal 834 Titanium Alloy under Mode I and Mixed Mode I/III Loading

Experimental and numerical analysis of the Portevin–Le Chatelier effect in a nickel-base superalloy for turbine disks application

Microstructure evolution and deformation texture during rolling of TIMETALⓇ 407

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