Suppr超能文献

ZK60镁合金微观结构与力学性能的双频超声处理

Dual-frequency ultrasonic treatment on microstructure and mechanical properties of ZK60 magnesium alloy.

作者信息

Chen Xingrui, Ning Fangkun, Hou Jian, Le Qichi, Tang Yan

机构信息

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, 314 Mailbox, Shenyang 110819, People's Republic of China.

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, 314 Mailbox, Shenyang 110819, People's Republic of China.

出版信息

Ultrason Sonochem. 2018 Jan;40(Pt A):433-441. doi: 10.1016/j.ultsonch.2017.07.027. Epub 2017 Jul 20.

Abstract

Compared with other dual-frequency acoustic applications, melt-treatment with dual-frequency ultrasound was less researched, especially in magnesium field. In this present work, traditional single-frequency ultrasonic field (SUF) treatment and dual-frequency ultrasonic field (DUF) treatment were used to refine the as-cast microstructure and improve the mechanical properties of the ZK60 (Mg-Zn-Zr) magnesium alloy. The influences of DUF on the microstructure evolution and mechanical properties were systematically investigated, and the cavitation bubble's dynamic behaviors were investigated by numerical simulation. α-Mg grains and second phases were dramatically refined by introduced ultrasound, and DUF showed higher refinement efficiency than SUF. The DUF treatment promoted the formation of small α-Mg globular grains and changed the distribution and morphology of MgZn phases. Mechanical properties of the as-cast alloy were much promoted with DUF. Yield strength, ultimate tensile strength and elongation increased to 153MPa, 239MPa and 13.9% respectively after 1400W DUF treatment, which were 30.8%, 42.3% and 58.0% higher than the values obtained from untreated samples and 20.5%, 20.7% and 30.0% higher than 1200W SUF treated samples. The DUF can generate more and larger cavitation bubbles, and make more bubbles into instantaneous bubbles, improving refinement efficiency.

摘要

与其他双频声学应用相比,双频超声熔体处理的研究较少,尤其是在镁领域。在本工作中,采用传统的单频超声场(SUF)处理和双频超声场(DUF)处理来细化ZK60(Mg-Zn-Zr)镁合金的铸态组织并改善其力学性能。系统研究了双频超声场对组织演变和力学性能的影响,并通过数值模拟研究了空化气泡的动态行为。引入超声显著细化了α-Mg晶粒和第二相,且双频超声场的细化效率高于单频超声场。双频超声场处理促进了细小α-Mg球状晶粒的形成,并改变了MgZn相的分布和形态。双频超声场显著提高了铸态合金的力学性能。1400W双频超声场处理后,屈服强度、抗拉强度和伸长率分别提高到153MPa、239MPa和13.9%,比未处理样品的值分别高30.8%、42.3%和58.0%,比1200W单频超声场处理的样品分别高20.5%、20.7%和30.0%。双频超声场能产生更多更大的空化气泡,并使更多气泡成为瞬态气泡,提高细化效率。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验