Brass-texture induced grain structure evolution in room temperature rolled ODS copper

Aghamiri, S.M.S.; Oono, Naoko; Ukai, Shigeharu; Kasada, Ryuta; Noto, Hiroyuki; Hishinuma, Yoshimitsu; Muroga, T.

doi:10.1016/j.msea.2019.02.019

Cited by 21 publications

(19 citation statements)

References 26 publications

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“…The details of processing can be found elsewhere [16]. The 80% rolled ODS copper was stored at room temperature and investigated after two annealing time of one week and ~14 months.…”

Section: Methodsmentioning

confidence: 99%

“…Hence, following to our new finding of a single brass-oriented deformed grain after room temperature rolling of ODS copper which deformed by partial slip mechanism [16], studying the recrystallization of such specific structure in view of the literature is a matter of particular importance. Such a modern microstructural investigation by the application of electron backscatter diffraction (EBSD) analyses via crystallographic texture and subgrain boundary and grain orientation spread have been introduced as the effective indications to partition the recrystallized/deformed structures [12].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…In order to reach optimum balance of strength and ductility, various studies have recently performed to understand the microstructure of copper and copper alloys during/after rolling [10][11][12][13][14][15][16][17]. New results of Konkova et al [12] indicate that static recrystallization can happen in cryo-rolled pure copper during long time (~1.5 years) storage at room temperature as a result of both grain-boundary bulging and recovery.…”

Section: Introductionmentioning

confidence: 99%

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Recrystallization of cold rolled oxide dispersion strengthened copper during room temperature annealing

Aghamiri

Ukai

Oono

et al. 2019

Journal of Alloys and Compounds

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Static discontinuous recrystallization was studied during room temperature annealing of a newly designed 80% room temperature rolled oxide dispersion strengthened copper. At early stages of annealing, fine new oriented nanosized/submicron grains were recrystallized in the unique matrix of single brassoriented deformed grain. Upon longer annealing time up to 14 months, the size, area fraction and number density of the recrystallized grains increased significantly along with changing the crystallographic textures. The analysis of misorientation angle distribution of boundaries indicated transformation of low angle boundaries to high angle boundaries results in nucleation of recrystallized grains by significant contribution of static recovery. Furthermore, the constant level of mechanical hardness after recrystallization was interpreted by the balance between grain size hardening, oxide particle hardening and strain hardening.

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“…The details of processing can be found elsewhere [16]. The 80% rolled ODS copper was stored at room temperature and investigated after two annealing time of one week and ~14 months.…”

Section: Methodsmentioning

confidence: 99%

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recrystallization of cold rolled oxide dispersion strengthened copper during room temperature annealing

Aghamiri

Ukai

Oono

et al. 2019

Journal of Alloys and Compounds

Self Cite

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“…On the other side, plastic deformation always leads to the generation of texture. Owing to the intrinsic plastic anisotropy of grains, the formed texture has significant effect on the mechanical properties of polycrystals [ 27 , 28 , 29 , 30 ]. If the metal has a strong texture, it means the anisotropy of the mechanical properties, and finally limits the following deformation strategies, particularly for scaling-up to industrial size samples [ 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Strengthening Mechanism of Flow Control Extrusion by Using Experiment and Numerical Simulation

Chen

2021

Materials

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Bimodal grain structure leads to high strength and strain hardening effect of metallic materials. In this study, an effective approach called flow control extrusion (FCE) is proposed to achieve heterostructures of pure copper. Compared with conventional extrusion (CE), FCE shows much stronger grain refine ability and much weaker grain orientation concentration. The significant grain refinement and heterostructures depend on the severe shear strain from FCE. The heterostructures of sample subject to FCE transfer from bimodal structure to gradient structure with the decrease of temperature, as the grains in the surface of sample are all refined to ultrafine scale. Both these two heterostructures can realize the improvement of strength and strain hardening effect simultaneously.

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“…3) The ODS-Cu alloys had a good ultimate tensile strength (UTS) of 491 MPa with a good ductility of 19%. 4) Nanoindentation hardness tests have a long history to evaluate irradiation hardening of ion-irradiated materials. 5) Our recent study suggested that a bulk-equivalent hardness in the ion-irradiated subsurface can be derived from depth profiles of the ion-irradiated Fe-based ferritic alloys based on the indentation size effect, damage-gradient effect and softer substrate effect.…”

Section: Introductionmentioning

confidence: 99%

Statistical Approach for Understanding the Effect of Specimen Size on the Yield Stress and Its Scattering in Mechanically-Alloyed Cu and ODS-Cu Obtained by Micro-Pillar Compression Test

Liu

Kondo

et al. 2020

Mater. Trans.

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Oxide Dispersion Strengthening copper (ODS-Cu) alloy has high strength, high thermal conductivity and superior irradiation resistance which are needed for fusion reactor divertor components. In this study, specimen size dependence of the yield stress in Cu and ODS-Cu which were made by mechanical alloying and hot pressing was investigated by micro-pillar compression test. The distributions of yield stress values were different between the sizes, 1, 3 and 5 µm cubic micro-pillars, which can be explained by the inhomogeneous spatial distributions of both the crystallographic grain in matrix and oxide-particles.

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Brass-texture induced grain structure evolution in room temperature rolled ODS copper

Cited by 21 publications

References 26 publications

Recrystallization of cold rolled oxide dispersion strengthened copper during room temperature annealing

Recrystallization of cold rolled oxide dispersion strengthened copper during room temperature annealing

Investigation on the Strengthening Mechanism of Flow Control Extrusion by Using Experiment and Numerical Simulation

Statistical Approach for Understanding the Effect of Specimen Size on the Yield Stress and Its Scattering in Mechanically-Alloyed Cu and ODS-Cu Obtained by Micro-Pillar Compression Test

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