文章信息/Info

Title:

The gradient nano structure of Mg alloys

作者:

夏雙五; 劉 勇; 呂 堅

1南昌大學(xué) 江西省高性能精確成形重點實驗室， 南昌 330031
2香港城市大學(xué) 機(jī)械與生物醫(yī)學(xué)工程系， 香港 九龍
3香港城市大學(xué)深圳研究院 先進(jìn)結(jié)構(gòu)材料中心，中國 深圳 518057

Author(s):

Xia Shuangwu;  Liu Yong;  Lu Jian

1Key Laboratory of Near Net Forming of Jiangxi Province, Nanchang University, Nanchang 330031, PR China
2Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, PR China
3Centre for Advanced Structural Materials, City University of Hong Kong, Shenzhen Research Institute, Shenzhen 518057, PR China

關(guān)鍵詞:

鎂合金; 梯度納米結(jié)構(gòu); 塑性變形; 力學(xué)性能; 熱穩(wěn)定性

DOI:

10.7502/j.issn.1674-3962.2016.11.03

文獻(xiàn)標(biāo)志碼:

A

摘要:

為了拓展鎂合金的進(jìn)一步應(yīng)用，尋找一種理想的加工工藝，提升綜合性能是鎂合金未來發(fā)展方向。基于塑性變形構(gòu)筑梯度納米結(jié)構(gòu)鎂合金，具有細(xì)晶與粗晶的綜合特征，能夠有效克服納米結(jié)構(gòu)低塑性和低韌性的缺陷，明顯提升材料的強(qiáng)度、耐磨性能等各項力學(xué)性能以及熱穩(wěn)定性，最大程度提升了鎂合金的綜合性能。本文從梯度納米結(jié)構(gòu)鎂合金的制備工藝、形成機(jī)理以及各項性能的變化等方面入手，系統(tǒng)介紹了國內(nèi)外梯度納米結(jié)構(gòu)鎂合金的研究現(xiàn)狀。針對進(jìn)一步拓展梯度納米結(jié)構(gòu)鎂合金在工業(yè)基礎(chǔ)中的應(yīng)用，本文還提出了若干改進(jìn)梯度納米結(jié)構(gòu)鎂合金性能的建議，如耐蝕性能和疲勞性能，以期對梯度納米結(jié)構(gòu)鎂合金未來的研究與發(fā)展提供更有價值的參考。

Abstract:

In order to expand the further using of Mg alloys, the future direction will focus on searching an ideal process and enhancing the comprehensive properties. Based on the function of plastic deformation, Mg alloys with the gradient nano structure, combined the characteristic of nano grain and coarse grain, can overcome the low plasticity and toughness of nano structure and significantly improve the mechanical performance like strength, wear resistance and thermal stability. Thus, Mg alloys with gradient nano structure can enhance the integrated performance to maximum extent. This paper reviews the investigation situation of domestic and foreign Mg alloys with gradient nano structure in terms of preparation process, the mechanism of formation and the variation of properties. However, Mg alloys with gradient nano structure exhibited inferior corrosion resistance. The combination of coating and gradient nano structure will be the key point of future to improve the corrosion resistance. Aimed at expand the industry application of Mg alloys with gradient nano structure, this paper also proposes the importance of fatigue tests and advices of improvement, looking forward to provide more valuable information for future work.