Microstructure transformation during warm working of β-treated lamellar Zircaloy-4 within the upper α-range

Chauvy, Cédric; Barbéris, Pierre; Montheillet, F.

doi:10.1016/j.msea.2006.05.031

Cited by 48 publications

(18 citation statements)

References 19 publications

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“…The compres- sive force is likely responsible for the buckling of a colonies that are observed in the TZ. Similar microkinking features were observed in lamellar Zircaloy-4 (Cezus Company (AREVA), France) [34] tested in uniaxial compression.…”

Section: E Transition Zonesupporting

confidence: 69%

Microstructural Changes Due to Friction Stir Processing of Investment-Cast Ti-6Al-4V

Pilchak

Juhas

Williams

2007

Metall Mater Trans A

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Friction stir processing (FSP) was used to modify the coarse fully lamellar microstructure on the surface of investment-cast and hot isostatically pressed (HIP) Ti-6Al-4V plate. The a colony and platelet structure in the base material (BM) was refined such that the effective slip length was reduced from the a colony size of the BM, several hundred microns, to that of fine equiaxed primary a grains that are on the order of 1 lm. This change in the microstructure resulting from FSP is expected to increase fatigue crack initiation resistance making it beneficial for titanium components for aerospace applications. The as-cast coarse lamellar microstructure has superior fatigue crack growth resistance compared to other microstructures that can be obtained by thermomechanical processing. Thus, it is likely that an increase in fatigue life is obtainable by FSP. Given the growing interest in friction stir welding (FSW) and FSP of titanium alloys, we believe some consistent microstructural descriptors will help avoid confusion. Accordingly, we propose terminology to standardize the descriptions of the microstructures created during FSP and FSW of titanium alloys. We also describe the microstructure changes that occur in the stir zone (SZ), transition zone (TZ), and heat-affected zone (HAZ) during FSP of Ti-6Al-4V.

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Section: E Transition Zonesupporting

confidence: 69%

Microstructural Changes Due to Friction Stir Processing of Investment-Cast Ti-6Al-4V

Pilchak

Juhas

Williams

2007

Metall Mater Trans A

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“…So, pieces are heated for a few minutes at 1050 1C and then water-quenched. It has been shown that the microstructure thus obtained controls the properties of the final parts [1,2]. Zircaloy-4 presents an allotropic transformation a2b.…”

Section: Introductionmentioning

confidence: 99%

Influence of the cooling rate on the texture and the microstructure of Zircaloy-4 studied by means of a Jominy end-quench test

Ammar

Aoufi

Darrieulat

2012

Materials Science and Engineering: A

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“…By comparison, the b phase matrix is bcc, with a lattice parameter of a50?355 nm. As discussed by Chauvy et al, 28 the a phase precipitates will obey the established Burgers' orientation relationship with the parent b phase matrix where…”

Section: Discussionmentioning

confidence: 93%

Temperature dependence of mechanical properties of zinc and Zircaloy measured using miniaturised disc tests

Hughes¹,

Flewitt

2008

Materials Science and Technology

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A miniaturised, small punch disc test method has been used to measure the load-displacement curves for a pure polycrystalline zinc and a Zircaloy 4 zirconium based alloy. The latter has a more complex microstructure than the zinc, comprising a phase (hcp) precipitates in a b phase (bcc) matrix. The load-displacement curves have been measured over a range of temperature that spans the ductile to brittle transition, with both yield stress and fracture energy measured from these data. The temperature dependence of the yield strength for each material has been compared with the corresponding bulk value. The temperature dependence of the total fracture energy obtained from the disc specimens provides a measure of the ductile to brittle transition temperature. Values obtained using Charpy impact test energies have been compared with these data empirically. The results demonstrate the benefits of undertaking tests on small specimens to evaluate yield strength, fracture energy, the ductile to brittle transition temperature and to characterise the variation of fracture mode with temperature.

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Microstructure transformation during warm working of β-treated lamellar Zircaloy-4 within the upper α-range

Cited by 48 publications

References 19 publications

Microstructural Changes Due to Friction Stir Processing of Investment-Cast Ti-6Al-4V

Microstructural Changes Due to Friction Stir Processing of Investment-Cast Ti-6Al-4V

Influence of the cooling rate on the texture and the microstructure of Zircaloy-4 studied by means of a Jominy end-quench test

Temperature dependence of mechanical properties of zinc and Zircaloy measured using miniaturised disc tests

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