Effect of long period stacking ordered (LPSO) structure on the damping capacities of Mg–Cu–Mn–Zn–Y alloys

Wang, Jingfeng; Lu, Ruopeng; Wei, Wenwen; Huang, Xing; Pan, Fusheng

doi:10.1016/j.jallcom.2012.05.003

Cited by 49 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous studies [ 17 ], it is shown that, along with the increase of LPSO volume percentage, both the damping and mechanical performance are improved. The LPSO phase that is produced during solidification has a unique role in the damping and mechanics of magnesium alloys, and it can improve both properties at the same time.…”

Section: Introductionmentioning

confidence: 93%

Influence of Long-Period-Stacking Ordered Structure on the Damping Capacities and Mechanical Properties of Mg-Zn-Y-Mn As-Cast Alloys

Jiao

Zhao

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

Magnesium alloys are concerned for its mechanical properties and high damping performance. The influence of Mn toward the internal organization morphology of long-period stacking ordered (LPSO) second phase and the consistent damping performance in Mg-4.9Zn-8.9Y-xMn have been studies in this work. It has shown that the addition of Mn tends to diffuse to the LPSO interface and causes the LPSO phase to expand in the arc direction. The circular structure of LPSO can optimize the damping property of the alloy better than the structure with strong orientation, especially at the strain of 10−3 and 250 °C. With more additions of Mn, damping would have a reduction due to the dispersed fine LPSO phases and α-Mn particles. When the Mn content is higher than 1.02%, the grain is refined, and mechanical properties have been significantly improved. Mg-4.9%Zn-8.9%Y-1.33%Mn shows the best mechanical property.

show abstract

Section: Introductionmentioning

confidence: 93%

Influence of Long-Period-Stacking Ordered Structure on the Damping Capacities and Mechanical Properties of Mg-Zn-Y-Mn As-Cast Alloys

Jiao

Zhao

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the basis of G-L damping theory, the action of dislocation segments bowing back and forth between weak pinning points generates the damping weakly dependent on strain amplitude. Once the strain amplitude exceeds the critical value, the dislocation breaks away from weak points and is finally pinned by point defects, and this process results in the formation of strain-dependent damping Q H −1 [22].…”

Section: Optimisation Analysis Of Solid Solution Parametersmentioning

confidence: 99%

Optimisation of Heat Treatment Process for Damping Properties of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy Using Box–Behnken Design Method

Zhang

Kou

Yang

et al. 2019

Metals

View full text Add to dashboard Cite

High damping magnesium alloys have poor mechanical properties, so it is necessary to investigate the damping properties of high-strength wrought magnesium alloys to effectively reduce vibration and noise in mechanical engineering. The aim of this work is to improve the mechanical damping performance of a novel high-strength Mg-13Gd-4Y-2Zn-0.5Zr magnesium alloy by optimising the heat treatment process. The mechanical damping coefficient, considering not only damping capacity but also the yield strength, is selected as one of the evaluation indexes. The other evaluation index is the tensile strength. The solid solution and ageing treatment were optimised by Box-Behnken method, an efficient experimental design technique. Heat treatment experiments based on the optimal parameters verified that the best process is a solution at 520 °C for 10 h followed by ageing at 239 °C for 22 h. The damping coefficient reaches 0.296, which is 73.1% higher than that before heat treatment. There was a good agreement between the experimental and Box-Behnken predicted results. The microstructure, morphology and composition of the second phases after heat treatment were analysed by SEM, XRD and EDS. Due to the high content of alloying elements in Mg-13Gd-4Y-2Zn-0.5Zr alloy, there are a large number of second phases after heat treated. They mainly include layer, short rod-shaped, bulk long period stacking order (LPSO) Mg12YZn and granular Mg5Gd phases. It was found that the area fraction of the second phases has an extreme effect on the damping capacity and short rod-shaped LPSO can effectively improve the damping capacity of heat-treated Mg-13Gd-4Y-2Zn-0.5Zr alloy. The volume fraction of the second phases was analysed by ImageJ software. It was concluded that the smaller the area occupied by the second phases, the better the mobility of the dislocation, and the better the damping performance of the alloy. The statistical analysis results obtained using ImageJ software are consistent with the experimental results damping capacity.

show abstract

“…LPSO phase is a hot spot in the research of magnesium alloys. In the study of the influence of LPSO on the damping of magnesium alloy [8][9][10][11], it is found that the mechanical properties and damping properties were improved with the increase of LPSO content. In addition, the microstructure of LPSO phase in magnesium alloy can be changed by heat treatment to improve the damping and mechanical properties of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Effects of heat treatment routes on microstructure and damping properties of Mg–Zn–Y–Mn alloys

Zhang¹,

Niu²,

2023

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

The effects of different heat treatment processes on the morphology and damping properties of long-period stacking order (LPSO) phase in Mg-4.9Zn-8.9Y-xMn alloys were studied. The microstructure analysis shows that the as-cast second phase presents a vein-shaped distribution at the grain boundary, and the heat treatment temperature has a significant effect on the morphology of the second phase. After heat treatment at 540 ℃, the LPSO phase at the grain boundary changes into rod-like; When the heat treatment temperature is 550 ℃, the LPSO phase changes into bulk or flocculent, and part of the LPSO phase melts into the matrix.In this process, the addition of Mn also has an important influence on the morphology transformation of LPSO phase. An appropriate amount of Mn can divide the bulk LPSO into several small parts during heat treatment, thus forming a large number of dispersed LPSO phases. In general, heat treatment and Mn elements can affect the mechanical and damping properties of the alloy. Heat treatment can reduce the mechanical properties of the alloy, but effectively improve the damping properti es of the alloy. With the addition of Mn into the alloy, the mechanical properties of the alloy can be improved without significantly reducing the damping.

show abstract

Effect of long period stacking ordered (LPSO) structure on the damping capacities of Mg–Cu–Mn–Zn–Y alloys

Cited by 49 publications

References 28 publications

Influence of Long-Period-Stacking Ordered Structure on the Damping Capacities and Mechanical Properties of Mg-Zn-Y-Mn As-Cast Alloys

Influence of Long-Period-Stacking Ordered Structure on the Damping Capacities and Mechanical Properties of Mg-Zn-Y-Mn As-Cast Alloys

Optimisation of Heat Treatment Process for Damping Properties of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy Using Box–Behnken Design Method

Effects of heat treatment routes on microstructure and damping properties of Mg–Zn–Y–Mn alloys

Contact Info

Product

Resources

About