Investigation on microstructure and mechanical properties of multiphase ZrSn1.5Alx alloy with simultaneous enhance of strength and plasticity
Investigation on microstructure and mechanical properties of multiphase ZrSn1.5Alx alloy with simultaneous enhance of strength and plasticity
复制标题
高强塑性多相ZrSn 1.5 Al x 合金显微组织与力学性能研究
DOI：
10.1016/j.jallcom.2020.154839
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发表时间：
2020-08
影响因子：
6.2
通讯作者：
Liu R.P.
中科院分区：
文献类型：
--
作者：
Chen B.H.;Liu S.G.;Ji P.F.;Li B.;Zhang X.Y.;Ma M.Z.;Liu R.P.
有许多方法和机制可以强化合金，但通常是以塑性为代价的。强度还是可塑性？在实践中，两者往往表现为矛盾的关系。在目前的工作中，ZrSn1.5Alx(x_(？)=9.6，8，10，12，14at.通过控制Al含量获得的合金在890℃下熔炼和热轧，然后立即淬火，获得了含有α+β++AlZr3多相结构的合金。与ZrSn1.5Al6合金相比，ZrSn1.5Al14合金具有较高的室温极限抗拉强度(1080.84℃)和较高的断裂伸长率(28.59%)，分别提高了27.6%和86.3%。AlZr3颗粒的形成通过改变位错的滑动方式，钉扎位错，促进位错的交叉滑移，提高位错形核速率，从而增加位错密度，促进均匀塑性变形，增强合金的应变硬化能力，从而提高合金的塑性和强度。用光学显微镜(OM)和扫描电子显微镜(SEM)观察了金相组织和拉伸断口形貌。观察了样品的透射电子显微镜亮场(TEM-BF)图像和扫描电子显微镜高角度环形暗场(STEM-HAADF)图像进行了详细的分析。在轧制方向采集试件，通过室温单轴拉伸试验评价其力学性能。综上所述，加工工艺简单，成本低，适合大规模工业级应用。对其他合金体系也有一定的借鉴意义。
There are many means and mechanisms to strengthen alloys, but often at the cost of plasticity. Strength or plasticity? In practice, the two often appear as contradictory relationships. In the current work, the ZrSn1.5Alx(x = 6, 8, 10, 12, 14 at. %) alloy obtained by controlling the Al content was smelted and hot-rolled at 890 °C, and then immediately quenched to obtain an alloy containing α + β + AlZr3 multiphase structure. Compared with ZrSn1.5Al6alloy, ZrSn1.5Al14alloy reaches a high ultimate tensile strength (1080.84 MPa) and a large elongation at fracture (28.59%) at room temperature, an increase of 27.6% and 86.3%, respectively. The formation of AlZr3 particles pins dislocations, promotes cross-sliding of dislocations, and improves the dislocation nucleation rate by changing the dislocation sliding mode, which increases the dislocation density and promotes uniform plastic deformation, enhance the strain-hardening ability of the alloys, thereby improve its plasticity and strength simultaneously. Optical microscopy (OM) and scanning electron microscope (SEM) were used to observe the metallographic structure and tensile fracture morphology. The transmission electron microscope bright field (TEM-BF) image and scanning transmission electron microscope high-angle annular dark field (STEM-HAADF) image of the sample were observed for detailed analysis. The samples were taken in the rolling direction and the mechanical properties were evaluated by uniaxial tensile tests at room temperature. In summary, the machining process is simple, the cost is low, and it is suitable for large-scale industrial-grade applications. It may have reference significance to other alloy systems.
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影响因子：
6
作者：
Hansen, N
通讯作者：
Hansen, N
影响因子：
3.5
作者：
Young Seok Kim;H. Park;J. Kim;S. Hong;G. Park;Jin Man Park;Jin-Yoo Suh;K. B. Kim
通讯作者：
Young Seok Kim;H. Park;J. Kim;S. Hong;G. Park;Jin Man Park;Jin-Yoo Suh;K. B. Kim
影响因子：
6.2
作者：
B. Kim;Soo-Min Baek;J. G. Lee;S. Park
通讯作者：
B. Kim;Soo-Min Baek;J. G. Lee;S. Park
影响因子：
8.4
作者：
Zhi-nan Yang;F. Zhang;Fengchao Liu;Zhigang Yan;Y. Xiao
通讯作者：
Zhi-nan Yang;F. Zhang;Fengchao Liu;Zhigang Yan;Y. Xiao
影响因子：
6.2
作者：
Ming Zhang;Fucheng Zhang;Zhi-nan Yang;Yingnan Li;Lin Qu;Huijuan Zhen
通讯作者：
Ming Zhang;Fucheng Zhang;Zhi-nan Yang;Yingnan Li;Lin Qu;Huijuan Zhen