Thermomechanical processing of titanium, zirconium, magnesium, and zinc in the hcp structure

McQueen, H.J.; Bourell, David L.

doi:10.1007/bf02834830

Cited by 20 publications

(17 citation statements)

References 73 publications

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“…In addition to dynamic recovery (DRV) and dynamic recrystallization (DRX), superplastic deformation has also been reported in Zr alloys by McQueen and Bourell [43]. Structural changes can also occur during the intervals of hot working in the absence of stress (static) as well as during cooling after hot working [43].…”

Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 90%

“…Structural changes can also occur during the intervals of hot working in the absence of stress (static) as well as during cooling after hot working [43]. Zr alloy systems are also known to exhibit strain localization leading to non-uniform microstructures during deformation processing.…”

Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 98%

“…Zr alloys are mainly hot worked in the (a + b) phase field [43,44]. A difference in crystal structure, coupled with a very high diffusivity in the b-phase (2-3 orders of magnitude higher than that in the a-phase), promotes the processes of recovery, recrystallization and diffusional transformation at lower temperatures and higher strain rates in the b-phase as compared to the a-phase.…”

Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 99%

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Microstructural evolution in zirconium based alloys

Tewari

Srivastava

Dey

et al. 2008

Journal of Nuclear Materials

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Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 90%

Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 98%

Section: Microstructural Evolution During Thermo-mechanical Treatmentsmentioning

confidence: 99%

See 1 more Smart Citation

Microstructural evolution in zirconium based alloys

Tewari

Srivastava

Dey

et al. 2008

Journal of Nuclear Materials

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“…Usually, this mechanism of GDRX can easily be confused with that of DDRX. Because Ti exhibits relatively high degrees of recoverability, DDRX can never be observed [19]. Therefore, GDRX seems most appropriate when describing the grain refinement process of CP-Ti during the FSW.…”

Section: Resultsmentioning

confidence: 99%

Twinning-induced mechanical properties’ modification of CP-Ti by friction stir welding associated with simultaneous backward cooling

Song

Bao

et al. 2017

Science and Technology of Welding and Joining

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Commercial pure Ti (CP-Ti) plates with 2 mm in thickness were successfully joined by friction stir welding (FSW) associated with simultaneous backward cooling. The measured processing temperatures were strictly controlled below the α/β phase transformation point. The microstructural characterisation showed that the stir zone has an ultra-refined grain structure with abundant twin boundaries by decreasing processing temperature. The geometric dynamic recrystallisation and twinning-induced dynamic recrystallisation were the main mechanisms of the grain refinement process. The resulting tensile properties of the stir zone illustrate that both the strength and ductility enhanced due to the appearance of abundant twin boundaries. This work also provides an effective strategy to enhance the strength of the stir zone of FSW CP-Ti joint without ductility loss.

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“…Material constants of the studied steel can be obtained, Table 2. The deformation activation energy Q is not only an important physical parameter which can indicate the difficulty level of plasticity deformation, but also correlates with the contents of added alloying elements [15]. The Q value is also influenced by many other factors, such as the concurrent dynamic precipitation, the dislocation pinning effect and the temperature dependence of element contents [16][17].…”

Section: Constitutive Equationmentioning

confidence: 99%

Hot deformation behavior and processing map of a Fe‐25Ni‐16Cr‐3Al alumina‐forming austenitic steel

Sun

Zhou

et al. 2018

Materialwissenschaft Werkst

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The hot deformation behavior of a Fe‐25Ni‐16Cr‐3Al alumina‐forming austenitic steel was studied by hot compression using a Gleeble‐3500 thermal simulator. The compression tests were carried out in the temperatures range from 925 °C to 1175 °C and strain rates range from 0.01 s‐1 to 10 s‐1. It was concluded that the flow stress increased with decreasing deformation temperature and increasing strain rate. The constitutive equation was obtained and the activation energy was 420.98 kJ⋅mol‐1 according to the testing data. According to the achieved processing map, the optimal processing domain is determined in the temperatures range of 1050 °C – 1075 °C and strain rates range of 0.03 s‐1 ‐ 0.3 s‐1. The evolution of microstructure characterization is consistent with the rules predicted by the processing map. During compression at the same temperature, the higher the strain rate is, the higher the hardness will be. The ultimate tensile strength of the steel is 779 MPa with a total elongation of 27.1 % at room temperature.

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Thermomechanical processing of titanium, zirconium, magnesium, and zinc in the hcp structure

Cited by 20 publications

References 73 publications

Microstructural evolution in zirconium based alloys

Microstructural evolution in zirconium based alloys

Twinning-induced mechanical properties’ modification of CP-Ti by friction stir welding associated with simultaneous backward cooling

Hot deformation behavior and processing map of a Fe‐25Ni‐16Cr‐3Al alumina‐forming austenitic steel

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