Effect of predeformation on microstructural evolution of a Zr alloy during 550–700°C aging after β quenching

Chai, Linjiang; Luan, Baifeng; Murty, K. Linga; Qing, Liu

doi:10.1016/j.actamat.2013.02.001

Cited by 56 publications

(14 citation statements)

References 44 publications

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“…1,16,18 Some believed the original texture has a significant effect on DRX grains size, 18 while others claimed the original texture does not affect DRX grains size. 16 After 45% hot compression, the DRX grains size of the 0u specimens and the 90u specimens is almost the same in this work, which indicates that the original texture does not have remarkable influence on the final DRX grains size.…”

Section: Microstructure Evolution and Drxmentioning

confidence: 98%

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Deformation mechanisms and dynamic recrystallisation of Zr alloy with different initial textures compressed at 700°C

Luan

Zhang

et al. 2014

Materials Research Innovations

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The hot deformation behaviour depends on the initial texture. In this study a hot rolled Zr alloy plate with a bimodal basal texture has been compressed at 700uC along two directions to study the effect of initial texture on deformation mechanisms and dynamic recrystallisation (DRX). Four strain levels (10, 20, 30 and 45%) of uniaxial compression were analysed. Microstructures and textures of deformed specimens were characterized and compared by electron backscatter diffraction (EBSD). At 10% strain, twins were observed in the two textures, but {10-12} tensile twins predominate in the sample with the bimodal basal texture normal to the compression direction. As the compression strain accumulates to 20%, DRX is also affected by the initial texture. When the c-axis is close to the compression axis (CA), extensive DRX process was observed. If the c-axis is perpendicular to the CA, DRX was obviously retarded. Due to the initiation of twinning, the stored energy accumulated by dislocations was relatively low. After 45% compression, the two specimens developed the same bimodal basal texture with the c-axis of most grains rotated toward CA.

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Section: Microstructure Evolution and Drxmentioning

confidence: 98%

“…1,2 The c/a axial ratio of zirconium alloy has a dominant influence on the activation shear stress of the slip systems. The ratio is lesser than the ideal sphere packing ( c/a 51?633).…”

Section: Introductionmentioning

confidence: 99%

Deformation mechanisms and dynamic recrystallisation of Zr alloy with different initial textures compressed at 700°C

Luan

Zhang

et al. 2014

Materials Research Innovations

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“…Prior beta grain structure is one of the vital structural factors which have a direct effect on the mechanical properties of as-deposited components produced by the layer-by-layer AM process. In recent years, there has been an increasing amount of literature focused on the correlation of the as-deposited grain size and morphology, post heat treatment, and mechanical properties of titanium parts [65][66][67][68][69]. It has been found that in the DED of titanium alloys large prior β grains grow epitaxially in the building direction from the parent grains in the melt pool, as a consequence of the rapid solidification due to the high thermal gradient [13,27,58,[70][71][72].…”

Section: Microstructurementioning

confidence: 99%

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

et al. 2017

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The directed energy deposition (DED) process can be employed to build net shape components or prototypes starting from powder or wires, through a layer-by-layer process. This process provides an opportunity to fabricate complex shaped and functionally graded parts that can be utilized in different engineering applications. DED uses a laser as a focused heat source to melt the in-situ delivered powder or wire-shaped raw materials. In the past years extensive studies on DED have shown that this process has great potential in order to be used for (i) rapid prototyping of metallic parts, (ii) fabrication of complex and customized parts, (iii) repairing/cladding valuable components which cannot be repaired by other traditional techniques. However, the industrial adoption of this process is still challenging owing to the lack of knowledge on the mechanical performances of the constructed components and also on the trustworthiness/durability of engineering parts produced by DED. This manuscript provides an overview of the additive manufacturing (AM) of titanium alloys and focuses in particular on the mechanical properties and microstructure of components fabricated by DED.

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“…The crystal defects and internal stress field could be introduced by cold pre‐deformation. Actually, a great number of recent studies have been focused on the effect of pre‐deformation on the properties of various materials, including aluminum alloy, Zirconium alloy, shape memory alloys, FeMn damping alloy and Mn‐15 at% damping alloy . In all, the defects and internal stress distribution aroused by the pre‐deformation play a critical role in affecting the properties of the above alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre‐Deformation and Subsequent Aging on the Damping Capacity of Mn‐20 at.%Cu‐5 at.%Ni‐2 at.%Fe alloy

Jin

et al. 2015

Adv Eng Mater

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In the paper, the effect of pre-deformation and subsequent aging treatment on the damping capacity and microstructure of Mn-20 at.%Cu-5 at.%Ni-2 at.%Fe (M2052) alloy is investigated. The logarithmic decrement (d) of the specimens with various pre-deformation degrees is determined to discuss the change of damping capacity before and after aging process. Meanwhile, the martensite and twinning structures with different deformation degree are comparatively studied. The results suggest that the d of the alloy decreases rapidly and the martensite plates are rearranged and become thinner with increase in deformation degree. Reasons accounting for the decrease are discussed and attributed to the internal stress field introduced during the deformation process which hinders the motion of the twin and phase boundaries. In addition, aging at 435°C for 20 min leads to a recovery of the damping capacity of the pre-deformed M2052 alloy. However, the recovery is highly dependent on the pre-deformation degree. The damping capacity of the specimens with a deformation less than 5% can be completely recovered after aging, while the others with a deformation exceeds 5% can be just partly recovered.

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Effect of predeformation on microstructural evolution of a Zr alloy during 550–700°C aging after β quenching

Cited by 56 publications

References 44 publications

Deformation mechanisms and dynamic recrystallisation of Zr alloy with different initial textures compressed at 700°C

Deformation mechanisms and dynamic recrystallisation of Zr alloy with different initial textures compressed at 700°C

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

Effect of Pre‐Deformation and Subsequent Aging on the Damping Capacity of Mn‐20 at.%Cu‐5 at.%Ni‐2 at.%Fe alloy

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