{112}〈111〉 Twinning during ω to body-centered cubic transition

Wu, S.Q.; Ping, Dehai; Yamabe‐Mitarai, Yoko; Xiao, Wenlong; Yang, Yugui; Hu, Qing‐Miao; Li, G.P.; Yang, Rong

doi:10.1016/j.actamat.2013.09.040

Cited by 76 publications

(36 citation statements)

References 24 publications

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“…In bcc metals and alloys, the {112} < 111 > twinning has been considered as a ω → bcc phase transition product and the ω structure or phase remains at the {112} < 111 > twinning boundary region. 25,38) Although the ω phase formed from bcc metals and alloys is having the same crystalline structure with the present discussed ω-Fe, which is formed from fcc-Fe, the bcc {112} < 111 > twinning mechanism in quenched carbon martensite is different from that in bcc metals and alloys. 33,38) Recent research results published by Yonemura et al have revealed that the γ-Fe → α-Fe solid-solid transformation can happen at around 600°C for Fe-0.02C (wt.%).…”

Section: Auto-temperingmentioning

confidence: 90%

“…25,38) Although the ω phase formed from bcc metals and alloys is having the same crystalline structure with the present discussed ω-Fe, which is formed from fcc-Fe, the bcc {112} < 111 > twinning mechanism in quenched carbon martensite is different from that in bcc metals and alloys. 33,38) Recent research results published by Yonemura et al have revealed that the γ-Fe → α-Fe solid-solid transformation can happen at around 600°C for Fe-0.02C (wt.%). 39) Such temperature was measured using an in situ two-dimensional time-resolved X-ray diffraction on the directional solidification process during fusion welding, in which the cooling rate can be controlled.…”

Section: Auto-temperingmentioning

confidence: 90%

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Microstructural Evolution and Carbides in Quenched Ultra-low Carbon (Fe–C) Alloys

et al. 2017

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Section: Auto-temperingmentioning

confidence: 90%

Section: Auto-temperingmentioning

confidence: 90%

Microstructural Evolution and Carbides in Quenched Ultra-low Carbon (Fe–C) Alloys

et al. 2017

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“…P r o v i d e d its a m o u n t c a n be limited and controlled a t t h e t a r g e t working t e m p e r a t u r e , however, t h e high s y m m e t r y a n d associated a b u n d a n c e of slip s y s t e m s of t h e Po p h a s e c a n b e exploited a t still higher t e m p e r a t u r e s t o achieve easier p r i m a r y w r o u g h t processing. In principle, t h e phase t r a n s f o r m a t i o n s t h a t are present in /3-type t i t a n i u m alloys, such as reversible ui [13] a n d reversible stress-induced m a r t e n s i t i c t r a n s f o r m a t i o n s [14], m a y also a p p e a r in t h e Po p h a s e of t h e T i A l b a s e d alloys if t h e right chemical, t h e r m a l a n d mechanical conditions are m e t .…”

Section: Strengthening Mechanisms Of Tial-nb Alloysmentioning

confidence: 99%

Fundamental and Application‐Oriented Research on Gamma Alloys

Yang

2014

Gamma Titanium Aluminide Alloys 2014

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Recent activities of 7 -T i A l related research at I M R is reviewed in this p a p e r . O n t h e f u n d a m e n t a l side, first principles computations were performed t o relate site occupancies and atomic interactions t o t h e mechanisms of s t r e n g t h e n i n g and phase t r a n s f o r m a t i o n , and to u n d e r s t a n d surface adsorption of oxygen a n d oxidation. D e f o r m a t i o n f u n d a m e n t a l s such as nucleation of superdislocations in t h e 7 phase were studied t h r o u g h molecular d y n a m i c s modeling. O u r application-oriented work covers extrusion a n d n e t -s h a p e forming t h a t includes b o t h precision casting a n d powder metallurgy. T h e evolution of textures d u r i n g t h e coupled process of deformation, phase transformation, recrystallization a n d grain g r o w t h during extrusion and subsequent heat t r e a t m e n t was characterized a n d related to mechanical properties. Centrifugal casting was employed to obtain quality p a r t s having thin sections b u t large size in 1-or 2-dimensions, a n d t h e problems such as misrun, cavities, surface porosity a n d inclusion as well as dimension distortion were tackled. Powder metallurgy was studied essentially as a technology u p g r a d e of precision casting, forming c o m p o n e n t s of complex s h a p e .

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“…A mechanism has been recently postulated for the nucleation, growth, and termination of the {112}<111>-type twins in bcc metals and alloys [11]. This twinning mechanism proposes that the {112}<111>-type twins are the product of reverse transformation of the ω phase to the original bcc matrix.…”

Section: Introductionmentioning

confidence: 98%

Effect of Pd addition on the microstructure of Ti-30Nb alloy

et al. 2015

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The effect of Pd addition on deformation mechanisms, phase transitions and twinning has been extensively investigated in as-cast β-type Ti-30Nb (wt%) alloy using electron backscattered diffraction and transmission electron microscopy techniques. The addition of Pd resulted in refinement of the metastable ω phase. The {112}<111>-type twinning was found to strongly depend on the size of the ω particles. No β phase twins were observed in the binary alloy with larger ω particles. In the ternary alloy with much finer ω particles, {332}<113> and abundant {112}<111>-type twins were detected. On the contrary, the volume fraction of stress-induced α" martensite in the binary alloy was higher than that in the ternary one. Based on the analysis of phase diagrams and Gibbs free energy calculations, such complex phase transition and twinning phenomena have been explained in terms of relative phase stability between the ω particles and the β matrix.

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{112}〈111〉 Twinning during ω to body-centered cubic transition

Cited by 76 publications

References 24 publications

Microstructural Evolution and Carbides in Quenched Ultra-low Carbon (Fe–C) Alloys

Microstructural Evolution and Carbides in Quenched Ultra-low Carbon (Fe–C) Alloys

Fundamental and Application‐Oriented Research on Gamma Alloys

Effect of Pd addition on the microstructure of Ti-30Nb alloy

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