Journal Article

IMPULSE-2020-00224

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Microstructure, texture and hardness of a metastable β-titanium alloy after bar-rolling and annealing

Gu, B. ; Chekhonin, P. ; Schaarschuch, R. ; Oertel, C.-G. ; Xin, S. W. ; Ma, C. L. ; Zhou, L. ; Gan, W. M.MLZ* ; Skrotzki, W.

2020
ScienceDirect Amsterdam [u.a.]

Please use a persistent id in citations: doi:10.1016/j.jallcom.2020.154082

Abstract: The microstructure and texture evolution of a metastable Tie5Ale3Ve3Moe2Cre2Zre1Nbe1Fe alloyduring bar-rolling and after various thermal treatments was investigated by high-energy synchrotrondiffraction and electron backscatter diffraction. Bar-rolling is applied in the (aþb)-phasefield in order toachieve a bi-modal (duplex) microstructure. The effect of dynamic recrystallized and recovered zones ontexture of Ti5321was analyzed separately, as well as the texture of primarya-precipitates and secondarya-lamellae. The texture of the recovered zones is characterized by a cube component ({001}<100>) plusa- andg-fibre with dominant {100}<110>,{112}<110>,{111}<110>components, while the texture of therecrystallized zones is a strong cube texture. After aging or recrystallization plus aging, this texturecomponent remains, while it disappears after solution treatment. The primarya-precipitates have theirc-axes perpendicular to the rolling direction and do not follow the Burgers orientation relationship. Thistexture characteristics remains after various thermal heat treatments. Secondarya-lamellae obey theBurgers orientation relationship. Moreover, a variant selection of secondarya-lamellae occurs. Themechanism of texture formation of theb-phase and the precipitation behavior of thea-phase is dis-cussed. The hardness increase can be attributed to size, shape and volume fraction of thea-precipitates.Different combinations of primarya- and secondarya-precipitates make an increase in hardness ofabout 11%.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. EDM (EDM)

Experiment(s):

1. STRESS-SPEC: Materials science diffractometer (SR3)

Appears in the scientific report 2020

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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