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首页> 外文期刊>Journal of Materials Research >Mechanical properties and internal friction of Mg-Zn-Y alloys with a long-period stacking ordered structure at different Y/Zn atomic ratios
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Mechanical properties and internal friction of Mg-Zn-Y alloys with a long-period stacking ordered structure at different Y/Zn atomic ratios

机译：不同Y / Zn原子比的长周期堆积有序结构Mg-Zn-Y合金的力学性能和内摩擦

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摘要

The mechanical properties and internal friction (damping capacity) of Mg-Zn-Y alloys with a long-period stacking ordered (LPSO) structure at different Y/Zn atomic ratios (2/1, 3/2 or 4/3) in cast and extrusion were investigated. It was found that the as-cast Mg-Zn-Y alloys with different Y/Zn atomic ratios possess a single LPSO phase with the same stable 18R-type structure. Among the three alloys, the alloy with 3/2 atomic ratio yields the highest damping capacity in low- and high-strain amplitude stages. Two damping peaks particularly P_1 and P_2 are detected in the Mg-Zn-Y alloy with 3/2 atomic ratio at approximately 108 and 220 ℃, respectively. These results may be attributed to few solute atoms in Mg matrix and grain boundaries. In addition, the studied alloy with 3/2 atomic ratio exhibits excellent comprehensive properties in as-cast and as-extruded states; this alloy yields an ultimate tensile strength of 346 MPa and maintains a certain damping capacity (Q~(-1) ＞ 0.01) in extrusion.
机译：具有长周期堆积有序（LPSO）结构的Mg-Zn-Y合金在不同的Y / Zn原子比（2 / 1、3 / 2或4/3）下的力学性能和内摩擦（阻尼能力）和挤压进行了研究。发现具有不同Y / Zn原子比的铸态Mg-Zn-Y合金具有单一的LPSO相，具有相同的稳定的18R型结构。在这三种合金中，原子比为3/2的合金在低应变和高应变振幅阶段均具有最高的阻尼能力。在3/2原子比的Mg-Zn-Y合金中，分别在大约108和220℃处检测到两个阻尼峰，特别是P_1和P_2。这些结果可能归因于镁基质和晶界中的溶质原子很少。另外，所研究的3/2原子比的合金在铸态和挤压态下表现出优异的综合性能。该合金的极限抗拉强度为346 MPa，在挤压过程中保持一定的阻尼能力（Q〜（-1）＞ 0.01）。

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  • 来源
    《Journal of Materials Research》 |2015年第21期|3354-3362|共9页
  • 作者

    Jingfeng Wang; Zhongshan Wu; Ruopeng Lu; Yongliang Chen; Song Huang; Dezhao Qin; Wenxiang Yang; Fusheng Pan;

  • 作者单位

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

    The State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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