INVESTIGATION OF DYNAMIC RECRYSTALLIZATION IN GAS TRANSPORTATION PIPELINE STEEL OF GRADE API X70

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NAKHAEI M.; HASHEMI S.H.

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Journal: Modares Mechanical Engineering Year:2014 | Volume:13 | Issue:14 Page(s): 150-159

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Title

INVESTIGATION OF DYNAMIC RECRYSTALLIZATION IN GAS TRANSPORTATION PIPELINE STEEL OF GRADE API X70

Author(s)

NAKHAEI M. | HASHEMI S.H. | Issue Writer Certificate

Keywords

HOT DEFORMATIONQ3

DYNAMIC RECRYSTALLIZATIONQ1

HOT COMPRESSION TESTQ2

API X70 PIPELINE STEELQ2

DYNAMIC RECRYSTALLIZATION KINETICSQ2

Abstract

In this research, the HOT DEFORMATION behavior of API X70 steel was investigated by HOT COMPRESSION TESTs. A temperature range between 950 and 1150 oC was used for experiments with different strain rates of 0.01, 0.1 and 1 s-1. The work hardening rate versus stress curves were used to reveal if DYNAMIC RECRYSTALLIZATION (DRX) occurred. The application of constitutive equations to determine the hot working constants for the tested steel was discussed. Using regression analysis, the stress multiplier (a), the apparent stress exponent (n), and the activation energy (Qd) for DRX were calculated as 0.016 and 4.420, and 382 kJ/mol, respectively. Furthermore, the effect of Zener–Hollomon parameter (Z) on the characteristic points of flow curves was investigated using the obtained relations. The DYNAMIC RECRYSTALLIZATION (DRX) kinetics of API X70 steel was also studied and its governing equation was derived.

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APA: Copy

NAKHAEI, M., & HASHEMI, S.H.. (2014). INVESTIGATION OF DYNAMIC RECRYSTALLIZATION IN GAS TRANSPORTATION PIPELINE STEEL OF GRADE API X70. MODARES MECHANICAL ENGINEERING, 13(14), 150-159. SID. https://sid.ir/paper/178701/en

Vancouver: Copy

NAKHAEI M., HASHEMI S.H.. INVESTIGATION OF DYNAMIC RECRYSTALLIZATION IN GAS TRANSPORTATION PIPELINE STEEL OF GRADE API X70. MODARES MECHANICAL ENGINEERING[Internet]. 2014;13(14):150-159. Available from: https://sid.ir/paper/178701/en

IEEE: Copy

M. NAKHAEI, and S.H. HASHEMI, “INVESTIGATION OF DYNAMIC RECRYSTALLIZATION IN GAS TRANSPORTATION PIPELINE STEEL OF GRADE API X70,” MODARES MECHANICAL ENGINEERING, vol. 13, no. 14, pp. 150–159, 2014, [Online]. Available: https://sid.ir/paper/178701/en

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