Effect of the strain on processing maps of titanium alloys in isothermal compression

Luo, Jiao; Li, Miaoquan; Yu, Wenbin; Li, Hong

doi:10.1016/j.msea.2008.10.020

Cited by 55 publications

(28 citation statements)

References 20 publications

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“…The instability map is established according to the irreversible thermodynamics extremum principles used for the large-scale plastic deformation body. The instability criterion is described by the instability parameter ξ [29]:…”

Section: Processing Mapmentioning

confidence: 99%

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

Lü

Zhang

et al. 2017

Metals

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This study investigated the hot deformation behavior of Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr alloy through isothermal compression tests at temperatures from 780 to 930 • C with strain rates ranging from 0.001 to 1 s −1 . The flow stress decreases with a decreased strain rate and an increased temperature. A constitutive equation was established for this alloy and the dependence of activation energy on temperature and strain rate is discussed. We further proposed a processing map using the dynamic materials model. On the processing map various domains of flow stability and flow instability can be identified. The deformation mechanisms associated with flow stability regions are mainly dynamic recrystallization (DRX) and dynamic recovery (DRV). The flow instability is manifested in the form of the band of flow localizations. The optimum processing conditions are suggested such that the temperature range is from 780 to 880 • C and the strain rate ranges from 0.001 to 0.01 s −1 .

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Section: Processing Mapmentioning

confidence: 99%

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

Lü

Zhang

et al. 2017

Metals

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“…A general procedure to investigate the microstructure evolution in hot working is summarized as follows: design and implement analogue experiments; acquire the hot working mechanism by metallurgical observation, stress-strain curves as well as processing map [15][16][17][18][19][20][21][22][23][24][25][26][27][28]; determine the processing window based on metallurgical observation and processing map [24,25]; acquire the influence regulation of hot working conditions on the microstructure parameters such as volume fraction, grain size, aspect ratio [25][26][27][28][29][30]; establish mathematical model to predict the microstructure changes [29][30][31][32][33][34][35]; optimize the hot working parameters to get the required microstructure.…”

Section: Microstructure Control In Hot Workingmentioning

confidence: 99%

Recent developments in plastic forming technology of titanium alloys

Yang

Fan

Sun

et al. 2011

Sci. China Technol. Sci.

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Titanium alloys have been used extensively in industry fields including aviation, aerospace and automobile due to their excellent comprehensive properties. Research and development of advanced plastic forming technology are of great importance to manufacturing titanium products of high performance and lightweight with low cost and short cycle. This paper analyzes the development tendencies of titanium alloy forming technology. Recent achievements in precision forming, microstructure control and multi-scale simulation of titanium alloys are reviewed. The forming techniques of large-sale integral complex components are presented. titanium alloys, precision forming, microstructure control, multi-scale simulation, large-scale integral complex components Citation:Yang H, Fan X G, Sun Z C, et al. Recent developments in plastic forming technology of titanium alloys.

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“…The variation of the instability parameter ξ with temperature and strain rate created the instability map, which can be superimposed on the power dissipation map to obtain the processing map at constant true strain [8,9]. The processing maps make it possible to determine processing windows, a major feature of which is the optimum conditions for the deformation processes.…”

Section: Introductionmentioning

confidence: 99%

Theoretical-Experimental Analysis of the Workability of the Ni50Cr45N0.6 alloy

Łukaszek-Sołek

Świątoniowski

Celadyn

et al. 2017

Archives of Metallurgy and Materials

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In this paper, the results of investigations into, and of the analyses of, the hot deformation behaviour of the Ni50Cr45N0.6 alloy were presented. Compression tests were conducted on a Gleeble 3800 thermo-mechanical simulator within the following temperatures range 850-1200°C and within that of the strain rate 1-40 s -1 to the constant true strain of 0.9, for the purpose of fulfilling the objective of obtaining experimental stress date. Those data were taken advantage of for the purpose of calculating the workability parameters, and that means the efficiency of power dissipation η, the flow instability ξ and the strain rate sensitivity m. The processing maps based upon Murty's criterion were drawn up for the following true strain range: 0.2-0.9, and, subsequently, both processing windows and the flow instability areas were determined. For the alloy being analysed, the most advantageous conditions of metal forming were ascertained within the following range of temperatures: 950-1000°C, and for that of the strain rate amounting to 10-40 s -1 , and that because of (occurring at the temperature of 950°C) the peak of the efficiency of power dissipation parameter η, amounting to 22% (in accordance with Murty's criterion). The flow instability areas identified on the processing maps ought to be avoided in metal forming processes. Experimental rolling tests were also conducted.

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Effect of the strain on processing maps of titanium alloys in isothermal compression

Cited by 55 publications

References 20 publications

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression

Recent developments in plastic forming technology of titanium alloys

Theoretical-Experimental Analysis of the Workability of the Ni50Cr45N0.6 alloy

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