Method of Evaluating Workability in Cold Pilgering of Zirconium Alloy Tube

Abe, Hikaru; Furugen, Munekatsu

doi:10.2320/matertrans.p-m2010812

Cited by 26 publications

(15 citation statements)

References 5 publications

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“…To determine the effect of the heat treatment regime, the samples after sintering at 800 °C and cooling at 400 °C/min were heated to 580 °C and 750 °C using a vacuum furnace built into a Gleeble 3800 plastometer with a residual pressure not higher than 10 −4 torr. In this temperature range, recrystallization takes place in metals and alloys based on zirconium [ 19 , 20 , 21 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Alternative Method for Manufacturing Structural Zirconium Elements for Nuclear Engineering

et al. 2021

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Zirconium is used as a structural material for use in aggressive environments, including the core of nuclear reactors. The traditional technology of manufacturing the structural elements of zirconium nuclear reactors is characterized by a long technological process and a significant amount of waste in the form of metal shavings. The paper presents the results of an alternative technology, spark plasma sintering, for manufacturing zirconium products. A complex of microstructural and mechanical studies of the obtained samples was carried out according to the ASTMB-351 standard. The sintering of zirconium powder and options for subsequent processing by various methods, including non-standard ones such as radial shear rolling, are justified.

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Section: Resultsmentioning

confidence: 99%

Development of Alternative Method for Manufacturing Structural Zirconium Elements for Nuclear Engineering

et al. 2021

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“…The cold pilgering and cold drawing induce tensile stress in the axial direction, and compressive stress in the circumferential direction. Ring compression tests have also been conducted to evaluate the workability of zirconium alloys after cold pilgering [12]. In this test, compressive stress after cold working was evaluated.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Workability on the Microstructure and Mechanical Property of Modified 9Cr-2W Steel for Fuel Cladding by Cold Drawing Process and Intermediate Heat Treatment Condition

hyeongmin

Kim

et al. 2018

Metals

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In this study, we evaluated the cold drawing workability of two kinds of modified 9Cr-2W steel containing different contents of boron and nitrogen depending on the temperature and time of normalizing and tempering treatments. Using ring compression tests at room temperature, the effect of intermediate heat treatment condition on workability was investigated. It was found that the prior austenite grain size can be changed by the austenite transformation and that the grain size increases with increasing temperature during normalizing heat treatment. Alloy B and Alloy N showed different patterns after normalizing heat treatment. Alloy N had higher stress than Alloy B, and the reduction in alloy N increased while the reduction in alloy B decreased. Alloy B showed a larger number of initially formed cracks and a larger average crack length than Alloy N. Crack length and number increased proportionally in Alloy B as the stress increased. Alloy B had lower crack resistance than Alloy N due to boron segregation.

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“…The applicability of the compression test as a general method for evaluating the cold workability of steel has been investigated [16][17][18]. Compression tests were carried out at 298 K and the strain rate of 1 mm/min using an INSTRON-3367 (INSTRON, Norwood, MA, USA) system to evaluate the mechanical properties and workability of the alloy B and Gr.92 specimens subjected to the different heat treatment processes.…”

Section: Compression Testmentioning

confidence: 99%

Influence of Heat Treatment on the Workability of Modified 9Cr-2W Steel with Higher B Content

Heo

Kim

et al. 2019

Metals

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In this study, the effect of heat treatment on the fracture behavior of alloy B steel with boron (B) contents as high as 130 ppm was investigated. The Alloy B are derived from Gr.92 steel with outstanding creep characteristics. The amounts of minor alloying elements such as B, N, Nb, Ta, and C were optimized to achieve better mechanical properties at high temperatures. Hence, workability of the alloy B and Gr.92 were compared. An increase in the B content affected the phase transformation temperature and texture of the steel. The development of the {111}<uvw> components in γ-fibers depended on the austenite fraction of the steel after the phase transformation. An increase in the B content of the steel increased its α-to-γ phase transformation temperature, thus preventing the occurrence of sufficient transformation under the normalizing condition. Cracks occurred at the point of the elastic-to-plastic deformation transition in the normal direction during the rolling process, thereby resulting in failure. Therefore, it is necessary to avoid intermediate heat treatment conditions, in which γ-fibers do not fully develop, i.e., to avoid an imperfect normalization.

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Method of Evaluating Workability in Cold Pilgering of Zirconium Alloy Tube

Cited by 26 publications

References 5 publications

Development of Alternative Method for Manufacturing Structural Zirconium Elements for Nuclear Engineering

Development of Alternative Method for Manufacturing Structural Zirconium Elements for Nuclear Engineering

Evaluation of Workability on the Microstructure and Mechanical Property of Modified 9Cr-2W Steel for Fuel Cladding by Cold Drawing Process and Intermediate Heat Treatment Condition

Influence of Heat Treatment on the Workability of Modified 9Cr-2W Steel with Higher B Content

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