Dynamic recrystallization behavior of Mg–Li–Al–Nd duplex alloy during hot compression

Xu, Tiancai; Peng, Xiaodong; Qin, Jihui; Chen, Y.F.; Yang, Yan; Wei, Guobing

doi:10.1016/j.jallcom.2015.03.144

Cited by 71 publications

(15 citation statements)

References 33 publications

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“…DRX plays an important role in refining microstructure, softening strain hardening and improving mechanical properties [6]. Depending on the deformation conditions (temperatures and strain rate), twin DRX (TDRX) [7], discontinuous DRX (DDRX) [8] and continuous DRX (CDRX) [9] are three main mechanisms in magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

“…Cheng et al [10] studied the DRX kinetics of an indirect-extruded Mg-8Sn-1Al-1Zn alloy and indicated that the DRX grains preferentially nucleated and developed at original grain boundaries and twins, Rao et al [11] reported that the softening related to DRX of as-cast Mg-2Sn-2Ca alloy was controlled by a cross-slip. However, DRX behaviors and mechanisms were not investigated systematically in preliminary researches [6][7][8][9][10]. Therefore, it is necessary to study the DRX behavior and microstructure evolution of Mg-Sn alloy during hot deformation processing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Cheng

You

et al. 2015

Materials & Design

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Cheng

You

et al. 2015

Materials & Design

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“…The value of k (εc = k εp) was summarized as 0.618 for AISI 304 stainless steel [40], and it was determined to be 0.81 for AZ31B alloy [41]. Xu and Peng et al [42] adopted the relationship between work-hardening and flow stress to determine the critical condition of DRX. Therefore, this paper will use the method of work-hardening rate θ (θ = dσ/dε) to determine the critical conditions of DRX of the superalloy.…”

Section: Determination Of the Critical Strainmentioning

confidence: 99%

Constitutive Model Based on Dynamic Recrystallization Behavior during Thermal Deformation of a Nickel-Based Superalloy

Zhang

Chen

et al. 2016

Metals

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Abstract:The thermal deformation and dynamic recrystallization (DRX) behavior of a nickel-based superalloy were investigated by the thermal compression test. The experimental results show that the process parameters have great influence on the flow stress of the superalloy. In addition, there is an inflection point on the DRX softening stage of the work-hardening rate versus stress curve. DRX under the conditions of higher temperatures and lower strain rates easily occurs when the strain reaches a critical level. Based on the classical dislocation density theory and the DRX kinetics models, a two-stage constitutive model considering the effect of work hardening-dynamic recovery and DRX is developed for the superalloy. Comparisons between the predicted and experimental data indicate that the values predicted by the proposed constitutive model are in good agreement with the experimental results.

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“…The addition of Li can decrease the c / a ratio of α ‐Mg, so that non‐basal slips become easier to be activated . Meanwhile, when Li content is between 5.5 and 10.3 wt%, the crystalline structure of a part of Mg–Li alloy transforms from HCP to BCC, which results in a α + β dual phase structure . The coexisting β ‐phase can increase the ductility and formability of dual phase Mg–Li alloys, some of these alloys even can be cold worked …”

Section: Introductionmentioning

confidence: 99%

Strengthening Effect and Texture of Mg–3Li Alloys Strengthened by Various Rare‐Earth Elements

Bao

Zhang

2018

Adv Eng Mater

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Three Mg-3Li-0.4Zr alloys strengthened by various rare-earth elements (RE: Gd, Nd, and Ce) are prepared and studied to obtain the strengthening effect and texture. The results indicate that Gd exhibits a dramatic strength enhancement with minimum ductility decrease compared with Nd and Ce, which is primarily attributed to the effective pinning effect by the solid dissolved Gd atoms and a great amount of dispersing and homogeneously distributing precipitates with the size from nanometers to decades of nanometers. Moreover, the grain boundary segregated Gd is able to restrain the movement of grain boundaries, which is also the primary strengthening mechanism of Nd and Ce elements. Aging treatment shows improvement on mechanical properties of the three RE-containing alloys, but with little obvious effect. At last, Gd-containing Mg-3Li-0.4Zr alloy has good application potential as a kind of new superlight structural material. Pyramidal slip and tension twinning are the primary mechanisms in the early stage of the extrusion process. Basal slip becomes the primary mechanism accompanied by the transfer of texture from extrusion texture to RE-texture ( parallel to extrusion direction) when the complete dynamic recrystallization is achieved. The Experimental Material and ProceduresCommercial pure Mg (99.95%) and pure Li (99.9%), Mg-50%Gd, Mg-20%Nd, Mg-10%Ce, and Mg-30%Zr master alloys were used in this work to prepare three RE-containing alloys and a RE-free

show abstract

Dynamic recrystallization behavior of Mg–Li–Al–Nd duplex alloy during hot compression

Cited by 71 publications

References 33 publications

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Constitutive Model Based on Dynamic Recrystallization Behavior during Thermal Deformation of a Nickel-Based Superalloy

Strengthening Effect and Texture of Mg–3Li Alloys Strengthened by Various Rare‐Earth Elements

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