Discontinuous dynamic recrystallization in α-Zr

Kapoor, R.; Reddy, G. Bharat; Sarkar, A.

doi:10.1016/j.msea.2018.01.117

Cited by 59 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[40][41][42][43] In a recent study, Zr that deformed at 800 C and 0.1 s À1 showed a grain orientation spread of less than 2 and was interpreted to undergo dDRX. [44] The similar phenomenon also occurs in zirconium alloys and aluminum alloys. [16,27,28,45] It is shown from another high dissipation region B at 950 C, 20 s À1 , deformed microstructure ( Figure 11d) that it also has a characteristic similar to the region A representing DRX.…”

Section: Microstructure Of Safe Domainsmentioning

confidence: 70%

“…Some researchers suggested gDRX, cDRX, and dynamic recovery as the grain refinement and restoration mechanisms . In a recent study, Zr that deformed at 800 °C and 0.1 s −1 showed a grain orientation spread of less than 2° and was interpreted to undergo dDRX . The similar phenomenon also occurs in zirconium alloys and aluminum alloys .…”

Section: Microstructural Evolutionmentioning

confidence: 86%

See 1 more Smart Citation

Elevated Temperature Compression Deformation Behavior of Commercial Pure Zr Combined with the Constitutive Equation and Processing Map

Wang

et al. 2019

Adv Eng Mater

View full text Add to dashboard Cite

The compression deformation behavior of commercial pure zirconium at elevated temperature is systematically investigated at different conditions. The corresponding deformation mechanism of pure Zr is clarified for analyzed flow stress, work hardening rate, activation energy, and microstructure. A modified Arrhenius‐type equation is proposed for future numerical simulation, which shows a good relativity between the theoretical and experimental data. The apparent deformation activation energy is 209 kJ mol−1, indicating that a cross‐slip of dominant dislocation mechanism controls the deformation process. Established based on the dynamic material model (DDM), processing maps indicate that the optimum processing conditions are 700–900 °C at 0.1–0.14 s−1 and 905–950 °C at 3–20 s−1 with the high efficiency of power dissipation. Microstructure examination reveals that the main restoration mechanism in the safe domain is related to dynamic recrystallization and the unstable regional microstructure results in the flow localization and cracking behavior.

show abstract

Section: Microstructure Of Safe Domainsmentioning

confidence: 70%

Section: Microstructural Evolutionmentioning

confidence: 86%

Elevated Temperature Compression Deformation Behavior of Commercial Pure Zr Combined with the Constitutive Equation and Processing Map

Wang

et al. 2019

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…Therefore, the deformed grains with a number of dislocations have high GOS values, while recrystallized grains free of dislocations have relatively lower GOS values. According to previous studies, it was reported that GOS could be used to identify DRX grains, such that particular grains with a GOS value less than 2° could be considered as DRX grains [ 23 , 26 ]. GND could be analyzed on the basis of Nye’s concept from local misorientation angle between neighboring lattices [ 5 ].…”

Section: Resultsmentioning

confidence: 99%

Strain-Rate Dependence of Tensile Behavior in Commercial-Grade Tungsten—Effect of Recrystallization Condition

Kong

Shin

et al. 2022

Materials

View full text Add to dashboard Cite

The tensile deformation behavior of double-forged (DF-W) and recrystallized (RX-W) commercial-grade tungsten was investigated at 700 °C. With increasing strain rate, the dominant dynamic recrystallization (DRX) mechanism changes from continuous dynamic recrystallization (CDRX) to discontinuous dynamic recrystallization (DDRX). For DF-W, pre-existing sub-grains promote CDRX and associated a high-DRX fraction, resulting in reduced post-necking strain under a static condition. With increasing strain rate, a shift in the restoration mechanism from CDRX to DDRX contributes to the enhanced ductility in DF-W, while RX-W shows enhanced flow hardening without a loss of ductility. These results suggest that the strain-rate dependence of mechanical behavior depends on the initial microstructure.

show abstract

“…The maximum peak intensity decreases with processing pass, and the refined grain size is found to enhance the texture randomization, especially at low temperature. erally, the hot deformation study considers that a grain with G ≤ 2° can be regarded as the dynamically recrystallized (DRX) [36][37]. In Fig.…”

Section: Microstructure Evolution Of Al-mg Alloy Processed By Cceedmentioning

confidence: 99%

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Zhang

Zheng

et al. 2021

Int J Miner Metall Mater

View full text Add to dashboard Cite

Al-Mg alloys are an important class of non-heat treatable alloys in which Mg solute and grain size play essential role in their mechanical properties and plastic deformation behaviors. In this work, a cyclical continuous expanded extrusion and drawing (CCEED) process was proposed and implemented on an Al-3Mg alloy to introduce large plastic deformation. The results showed that the continuous expanded extrusion mainly improved the ductility, while the cold drawing enhanced the strength of the alloy. With the increased processing CCEED passes, the multi-pass cross shear deformation mechanism progressively improved the homogeneity of the hardness distributions and refined grain size. Continuous dynamic recrystallization played an important role in the grain refinement of the processed Al-3Mg alloy rods. Besides, the microstructural evolution was basically influenced by the special thermomechanical deformation conditions during the CCEED process.

show abstract

Discontinuous dynamic recrystallization in α-Zr

Cited by 59 publications

References 41 publications

Elevated Temperature Compression Deformation Behavior of Commercial Pure Zr Combined with the Constitutive Equation and Processing Map

Elevated Temperature Compression Deformation Behavior of Commercial Pure Zr Combined with the Constitutive Equation and Processing Map

Strain-Rate Dependence of Tensile Behavior in Commercial-Grade Tungsten—Effect of Recrystallization Condition

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Contact Info

Product

Resources

About