Effect of cold rolling on microstructure and mechanical property of extruded Mg–4Sm alloy during aging

Li, Rongguang; Xin, Renlong; Chapuis, Adrien; Liu, Qing; Fu, Guang; Zong, Liang; Yu, Yongmei; Guo, Bin; Shu-guo, Guo

doi:10.1016/j.matchar.2015.12.011

Cited by 18 publications

(17 citation statements)

References 25 publications

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“…Deformed microstructure features determine the distribution of precipitates. It can be used to promote the uniform precipitation, as reported by Li et al [37]. Moreover, it can also be used to generate non-homogeneous distribution of precipitates, as reported by Song et al [27], Wang et al [29] and Liu et al [11].…”

Section: Strengthening Mechanism Via Combined Use Of Cold Deformatmentioning

confidence: 98%

“…Cold deformation can also influence the distribution and shape of precipitates, as shown in Figure 6. Li et al [37] found that cold deformation can induce more uniform precipitation in the matrix of the Mg-4Sm alloy. It is found that cold rolling remarkably suppresses the formation of precipitate-free zone in extruded Mg-4Sm alloy during subsequent aging.…”

Section: Influences Of Pre-cold Deformation On Aging Precipitationmentioning

confidence: 99%

“…Clearly, the cold deformation method can be a significant supplement to the above-mentioned methods. Particularly, some simple cold deformation ways with low cost (e.g., uniaxial tension/compression [22,33,34,35,36], free-end torsion [27], low-strain rolling/forging [26,37,38,39,40], etc.) have exhibited a great application potential in the regulation of precipitates.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous studies, these alloy systems have also become the main research objects to study the influences of cold deformation on the precipitates. It is demonstrated that the cold deformation prior to aging in Mg alloys can effectively enhance the aging-hardening effect of various Mg alloys (including Mg-Al [27,28,29,30], Mg-Zn [31,32,33,34], and Mg-RE alloy systems [26,35,36,37,38]). Based on these alloy systems, the influences of cold deformation on precipitation features in Mg alloys were reviewed in detail in this review.…”

Section: Introductionmentioning

confidence: 99%

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Regulating Precipitates by Simple Cold Deformations to Strengthen Mg Alloys: A Review

et al. 2019

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Regulating precipitates is still an important issue in the development of high-strength Mg alloys, due to it determining the precipitation hardening effect. Cold deformation, as a simple and low-cost method, can remarkably influence the precipitate features. It is found that pre-cold deformation before aging can be utilized to enhance the precipitation hardening effect of Mg alloys. Moreover, post-deformation after aging could be an effective method to regulate precipitation orientation. In this review, recent research on the regulation of precipitation behavior by cold deformation in Mg-Al, Mg-Zn, and Mg-RE (RE: rare-earth elements) alloy systems was critically reviewed. The changes in precipitate features and mechanical properties of peak-aged Mg alloys via cold deformation were summarized. The corresponding strengthening mechanisms were also discussed. Finally, further research directions in this field were proposed.

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Section: Strengthening Mechanism Via Combined Use Of Cold Deformatmentioning

confidence: 98%

Section: Influences Of Pre-cold Deformation On Aging Precipitationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Regulating Precipitates by Simple Cold Deformations to Strengthen Mg Alloys: A Review

et al. 2019

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“…The addition of rare-earth elements (RE) is an effective way to improve the mechanical properties of magnesium alloys [1][2][3][4]. The Mg-Nd-Zn-Zr alloy is one of the most successful Mg-RE alloy systems.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Age Strengthening of Mg-Nd-Zn-Zr Alloy via Pre-Stretching

Guo

Zhao

Wang

et al. 2016

Metals

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Pre-stretching was carried out to modify the microstructure of Mg-Nd-Zn-Zr alloy to enhance its age strengthening. The results indicated that more heterogeneous nucleation sites can be provided by the high density of dislocations caused by the plastic pre-stretching deformation, as well as speeding up the growth rate of precipitates. Comparison of microstructure in non-pre-stretched specimens after artificial aging showed that pre-stretched specimens exhibited a higher number density of precipitates. The fine and coarse plate-shaped precipitates were found in the matrix. Due to an increase in the number density of precipitates, the dislocation slipping during the deformation process is effectively hindered, and the matrix is strengthened. The yield strength stabilizes at 4% pre-stretching condition, and then the evolution is stable within the error bars. The 8% pre-stretched specimens can achieve an ultimate tensile strength of 297 MPa. However, further pre-stretching strains after 8% cannot supply any increase in strength. Tensile fracture surfaces of specimens subjected to pre-stretching strain mainly exhibit a trans-granular cleavage fracture. This work indicated that a small amount of pre-stretching strain can further increase strength of alloy and also effectively enhance the formation of precipitates, which can expand the application fields of this alloy.

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Tailoring the Microstructure and Mechanical Property of AZ80 Alloys by Multiple Twinning and Aging Precipitation

Wang

Xin

et al. 2017

Adv Eng Mater

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AZ80 alloy is a relatively inexpensive age-hardenable Mg alloy. To improve its precipitation strengthening effect, the discontinuous precipitates generally nucleating from grain boundaries should be reduced. In this study, the authors applied strain-path change compression on a wrought AZ80 alloy to generate multiple {10-12} twins and then the pre-deformed alloy is subjected to aging at 180 C for different period. The effects of the pre-generated twins on precipitation behavior and hence the mechanical properties are investigated. It is found that multiple {10-12} twins are formed in the AZ80 alloy after two paths of compressions along the transverse and rolling directions. Consequently, continuous precipitation is largely promoted during the subsequent aging process. Moreover, the continuous precipitates preferred to form inside the {10-12} twin lamellae. Discontinuous precipitation is almost inhibited during aging at 180 C for 4-96 h in the sample containing many multiple twins. Compare to the directly peak-aged sample, the pre-twinned and subsequently peak-aged alloys generally exhibit greatly superior mechanical properties. The yield strength, ultimate strength, and elongation for tension along RD are 242 MPa, 476 MPa, and 19.4%, respectively. These excellent properties are attributed to the combined effects of grain refinement, texture weakening, and enhanced precipitate strengthening.

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Effect of cold rolling on microstructure and mechanical property of extruded Mg–4Sm alloy during aging

Cited by 18 publications

References 25 publications

Regulating Precipitates by Simple Cold Deformations to Strengthen Mg Alloys: A Review

Regulating Precipitates by Simple Cold Deformations to Strengthen Mg Alloys: A Review

Enhanced Age Strengthening of Mg-Nd-Zn-Zr Alloy via Pre-Stretching

Tailoring the Microstructure and Mechanical Property of AZ80 Alloys by Multiple Twinning and Aging Precipitation

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