Hot tensile deformation behaviors and constitutive model of 42CrMo steel

Huang, Yuanchun; Lin, Yuhong; Deng, Jiao; Liu, Ge; Chen, Mingsong

doi:10.1016/j.matdes.2013.06.070

Cited by 68 publications

(19 citation statements)

References 44 publications

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“…Therefore, it is significant to understand the hot tensile deformation behaviors and fracture characteristics of alloys for the optimal processing parameters. Recently, some researchers have studied the hot tensile deformation behaviors and fracture characteristics of different materials, such as CP-Ti [21], magnesium alloys [22,23], 42CrMo steel [24], GH4169 superalloy [25,26], Boron Steel [27], Al-Cu-Mg alloy [28], pure titanium [29], low carbon and micro alloyed steel [30].…”

Section: Introductionmentioning

confidence: 99%

Hot tensile deformation behaviors and constitutive model of an Al–Zn–Mg–Cu alloy

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Hot tensile deformation behaviors and constitutive model of an Al–Zn–Mg–Cu alloy

et al. 2014

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“…1(a), flashes were formed by the squeezed hot metal and deformed layers under forged pressure during welding. It also can be seen that the flashes mainly consisted of steel, and TiAl alloy deformed slightly because TiAl alloy has stronger high-temperature strength, compared to 42CrMo steel [14,15]. The tensile strength of the joint reached 405 MPa, and fracture happened through the TiAl alloy base metal, as shown in Fig.…”

Section: Methodsmentioning

confidence: 87%

Direct Friction Welding of TiAl Alloy to 42CrMo Steel Rods

Dong

Deng

et al. 2014

Materials and Manufacturing Processes

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The effect of post-weld heat treatment (PWHT) on the mechanical properties and microstructure of direct friction-welded joint between TiAl alloy and 42CrMo steel rods was investigated in this paper. It was found that solid joint between TiAl alloy and 42CrMo steel could be obtained without adding interlayer. After PWHT at 580 C for 2 h, the tensile strength of the joint reached 405 MPa, and fracture happened through the TiAl alloy substrate with quasi-cleavage features. The tempered sorbite formed near the interface, improving the joint strength significantly. It was found that TiFe 2 , TiAl, and small amount of TiC brittle phases formed at the interface, and the interfacial layer was as thin as 2-5 mm. The precipitated phases were 1 mm in average size, and distributed discontinuously at the interface.

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“…The power-law constitutive equation is the simplest way of describing the tensile stress, given by: 25) ... (1) where, K(T) is a constant that depends on tensile deformation and m stands for the strain rate sensitivity parameter. It is possible to show that the hot ductility of a material depends also on the value of m. 26,27) It actually reflects how much the material withstands against flow localization. When plastic flow is localized in some parts of a workpiece the strain rate increases locally at those positions.…”

Section: Flow Curves and Constitutive Analysismentioning

confidence: 99%

Hot Ductility of Incoloy 901 Produced by Vacuum Arc Remelting

Shore¹,

Morakabati²,

Abbasi³

et al. 2014

ISIJ Int.

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Hot tensile testing was adopted over the temperature range of 850°C-1 150°C and at strain rates of 0.001 s -1 -1 s -1 to study the hot ductility of Incoloy 901. Hot ductility of the material was optimized in range of 950°C-1 050°C and descended at either higher or lower temperatures. Dynamic recrystallization was the reason for the improvement of ductility at high temperatures. At lower temperatures, e.g. 850°C, dynamic precipitation of intermetallic phases could effectively inhibit dynamic recrystallization and resulted in poor hot ductility.At very high temperatures, e.g. 1 150°C, the hot ductility drop was due to the decohesion of particles/ matrix interfaces. The insensitivity of material to flow localization was understood from the monotonic increase of the strain rate sensitivity over the studied temperature range. The peak strain of the material unexpectedly increased with increasing temperature up to 1 050°C and then decreased at higher temperatures. These results accounted for the possibility of dynamic precipitation of intermetallics at temperatures below 1 050°C and thereby delaying dynamic recrystallization. The hyperbolic sine constitutive equation was used to describe the dependence of tensile stress on deformation temperature and strain rate and the corresponding material constants were determined. The average apparent activation energy for the initiation of dynamic recrystallization was determined as 359 kJ mol -1 .

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Hot tensile deformation behaviors and constitutive model of 42CrMo steel

Cited by 68 publications

References 44 publications

Hot tensile deformation behaviors and constitutive model of an Al–Zn–Mg–Cu alloy

Hot tensile deformation behaviors and constitutive model of an Al–Zn–Mg–Cu alloy

Direct Friction Welding of TiAl Alloy to 42CrMo Steel Rods

Hot Ductility of Incoloy 901 Produced by Vacuum Arc Remelting

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