The analysis of the hot deformation behaviour of the Ti–3Al–8V–6Cr–4Zr–4Mo alloy, using processing maps, a map of microstructure and of hardness

Łukaszek-Sołek, A.; Krawczyk, J.

doi:10.1016/j.matdes.2014.09.023

Cited by 47 publications

(16 citation statements)

References 27 publications

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“…During the hot forming of Ti alloy parts, the thermomechanical behavior determines the final microstructures and properties of products . Therefore, investigating the flow characteristics, deformation mechanisms, and ductile fracture behavior of Ti alloys at high temperatures is vital for material and processing designers …”

Section: Introductionmentioning

confidence: 99%

“…[3,4] Therefore, investigating the flow characteristics, deformation mechanisms, and ductile fracture behavior of Ti alloys at high temperatures is vital for material and processing designers. [5][6][7][8] Generally, the hot workability of alloys are significantly influenced by deformation parameters. [9][10][11] Constitutive models are usually inserted into finite element software to simulate the variations of flow stresses with deformation parameters.…”

Section: Introductionmentioning

confidence: 99%

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Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Lin

Pang

et al. 2019

Adv Eng Mater

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The deformation mechanisms and dynamic softening behavior of a Ti–6Al–4V alloy with thick lamellar microstructures are studied by uniaxial hot tensile tests. The true stress first rapidly reaches a peak value because of the rapid dislocations proliferation and tangle, and then gradually decreases due to the dynamic softening with raising the deformation amount. The dynamic softening behavior is mainly induced by the severe dynamic globularization of lamellar α phases. The globularization of α phase is always accompanied by the formation of high‐angle grain boundaries (HAGBs). The fraction of globularized α phases increases with the increasing deformation temperature. The fracture mechanism is microvoid coalescence, i.e., in the initial stage of tensile deformation, the microvoids begin to emerge. With the increasing deformation amount, the number of microvoids increases, and the microvoids accumulate and accelerate to propagate until the final fracture. According to the experimental flow stress curves, a modified Arrhenius‐type equation and a Hensel–Spittel (HS) model are developed to forecast the flow stresses. The average absolute relative error of the established strain‐compensated Arrhenius‐type (SCAT) and HS models are 6.108% and 3.385%, respectively. Both models can be well used to describe the hot tensile flow characteristics of the Ti–6Al–4V alloy with thick lamellar microstructures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Lin

Pang

et al. 2019

Adv Eng Mater

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“…Previous researches [4][5][6][7][8] showed that the strain rate, deformation temperature and excursion strain served the primary roles in tuning the microstructures and mechanical properties of forged superalloys. Over the past 30 years, the processing map had been well established as an effective technique to understand hot working behavior of numerous materials [9][10][11][12][13][14][15] and nickel-based superalloys using hot compression and hot torsion, for example: Rene 95 [1], IN-625 [3], IN-718 [16], NIMONIC AP-1 [17], IN-100 [18], FGH96 [19], IN-939 [20], and others [21][22][23]. In this article, we focused on the deformation behaviors of a new designed P/M nickel-based superalloy.…”

Section: Introductionmentioning

confidence: 99%

Characterization of hot compression behavior of a new HIPed nickel-based P/M superalloy using processing maps

Liu

et al. 2015

Materials & Design

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“…As a result, the criterion judging the unstable flow of metal material during plastic deformation is expressed as follows [31]:…”

Section: Principle For the Processing Mapmentioning

confidence: 99%

Processing Map of NiTiNb Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

Wang

Jiang

Zhang

2017

Metals

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Abstract:The processing map of Ni 47 Ti 44 Nb 9 (at %) shape memory alloy (SMA), which possesses B2 austenite phases and β-Nb phases at room temperature, is established in order to optimize the hot working parameters. Based on true stress-strain curves of NiTiNb SMA during uniaxial compression deformation at the temperatures ranging from 700 to 1000 • C and at the strain rates ranging from 0.0005 to 0.5 s −1 , according to dynamic material model (DMM) principle, the processing map of NiTiNb SMA is obtained on the basis of power dissipation map and instability map. The instability region of NiTiNb SMA increases with increasing the true strain and it mainly focuses on the region with high strain rate. The workability of NiTiNb SMA becomes worse and worse with increasing plastic strain, as well as decreasing deformation temperature. There exist two stability zones which are suitable for hot working of NiTiNb SMA. In one stability region, the deformation temperature ranges from 750 to 840 • C and the strain rate ranges from 0.0003 to 0.001 s −1 . In the other stability region, the deformation temperature ranges from 930 to 1000 • C and the strain rate ranges from 0.016 to 0.1 s −1 . The severe microstructure defects, such as coarsening grains, band microstructure, and intercrystalline overfiring appear in the microstructures of NiTiNb SMA which is subjected to plastic deformation in the instability zone.

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The analysis of the hot deformation behaviour of the Ti–3Al–8V–6Cr–4Zr–4Mo alloy, using processing maps, a map of microstructure and of hardness

Cited by 47 publications

References 27 publications

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Characterization of hot compression behavior of a new HIPed nickel-based P/M superalloy using processing maps

Processing Map of NiTiNb Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

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