Determination of the friction factor of Ti-6Al-4V titanium alloy in hot forging by means of ring-compression test using FEM

Zhu, Yanan; Zeng, Weidong; Ma, Xiong; Tai, Qingan; Li, Zhihua; Xiao-guang, LI

doi:10.1016/j.triboint.2011.07.001

Cited by 70 publications

(22 citation statements)

References 26 publications

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“…(48) and the friction parameters determined by friction calibration curves will be performed in Section 5.3. For shear friction model, the friction factor m is about 0.2 to 0.3 in lubricated hot forming process recommended by DEFORM manual [21], and is about 0.35 for Ti-6Al-4V alloy in nonisothermal forming process with glass lubricant [25], and is about 0.12-0.40 at 950 1C and 0.16-0.50 at 970 1C under different glass lubricants for Ti-6Al-2Zr-1Mo-1V alloy in isothermal forming process [26]. Thus, m ¼0.3 was chosen in this section, and consequently friction coefficient μ is about 0.1731.…”

Section: Resultsmentioning

confidence: 99%

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Analytical and numerical analyses of local loading forming process of T-shape component by using Coulomb, shear and hybrid friction models

Zhang

Yang

2015

Tribology International

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Section: Resultsmentioning

confidence: 99%

“…Using the ring compression test, many of the researches of the friction in the bulk forming have been published [22][23][24][25][26]. However, extrusion friction test such as double cup extrusion may be more suitable for determining the magnitude of friction in the bulk forming under high contact pressures such as extrusion [27].…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical analyses of local loading forming process of T-shape component by using Coulomb, shear and hybrid friction models

Zhang

Yang

2015

Tribology International

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“…Male and Depierre [33] used a ring compression test to characterize the friction behavior, indicating the universal friction calibration curves. The ring compression test is a reliable way to determine the friction behaviors between PMMA and the mold [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Micro-Lens Array Using Contactless Micro-Embossing with an EDM-Mold

Huang

et al. 2018

Applied Sciences

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Micro embossing is an effective way to fabricate a polymethyl methacrylate (PMMA) specimen into micro-scale array structures with low cost and large volume production. A new method was proposed to fabricate a micro-lens array using a micro-electrical discharge machining (micro-EDM) mold. The micro-lens array with different shapes was established by controlling the processing parameters, including embossing temperature, embossing force, and holding time. In order to obtain the friction coefficient between the PMMA and the mold, ring compression tests were conducted on the Shenzhen University’s precision glass molding machine (SZU’s PGMM30). It was found that the friction coefficient between the PMMA specimen and the mold had an interesting change process with increasing of temperature, which affected the final shape and stress distribution of the compressed PMMA parts. The results of micro-optical imaging of micro-lens array indicated that the radius of curvature and local length could be controlled by adjusting the processing parameters. This method provides a basis for the fabrication and application of micro-lens arrays with low-cost, high efficiency, and mass production.

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“…Therefore, great attention has been given in the scientific literature to the investigation of the deformation behavior of this alloy [17,18]. As is well known, the deformation behavior of Ti-6Al-4V alloy is sensitive to the processing parameters such as temperature and strain rate [19], and a lot of hot forming process of Ti6Al-4V alloy is located at α þ β phase [20][21][22]. Hence, a thorough study on elevated temperature deformation behavior of Ti-6Al-4V alloy is significant to properly design the deformation parameters.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Johnson Cook, Modified Zerilli–Armstrong and Arrhenius-Type Constitutive Models to Predict High-Temperature Flow Behavior of Ti–6Al–4V Alloy in α + β Phase

Cai

Wang

Han

2016

High Temperature Materials and Processes

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True stress and true strain values obtained from isothermal compression tests over a wide temperature range from 1,073 to 1,323 K and a strain rate range from 0.001 to 1 s -1 were employed to establish the constitutive equations based on Johnson Cook, modified ZerilliArmstrong (ZA) and strain-compensated Arrhenius-type models, respectively, to predict the high-temperature flow behavior of Ti-6Al-4V alloy in α þ β phase. Furthermore, a comparative study has been made on the capability of the three models to represent the elevated temperature flow behavior of Ti-6Al-4V alloy. Suitability of the three models was evaluated by comparing both the correlation coefficient R and the average absolute relative error (AARE). The results showed that the Johnson Cook model is inadequate to provide good description of flow behavior of Ti-6Al-4V alloy in α þ β phase domain, while the predicted values of modified ZA model and the strain-compensated Arrhenius-type model could agree well with the experimental values except under some deformation conditions. Meanwhile, the modified ZA model could track the deformation behavior more accurately than other model throughout the entire temperature and strain rate range.

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Determination of the friction factor of Ti-6Al-4V titanium alloy in hot forging by means of ring-compression test using FEM

Cited by 70 publications

References 26 publications

Analytical and numerical analyses of local loading forming process of T-shape component by using Coulomb, shear and hybrid friction models

Analytical and numerical analyses of local loading forming process of T-shape component by using Coulomb, shear and hybrid friction models

Manufacturing of Micro-Lens Array Using Contactless Micro-Embossing with an EDM-Mold

A Comparative Study on Johnson Cook, Modified Zerilli–Armstrong and Arrhenius-Type Constitutive Models to Predict High-Temperature Flow Behavior of Ti–6Al–4V Alloy in α + β Phase

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