鎂合金的攪拌摩擦焊接研究現(xiàn)狀與展望

鎂合金的攪拌摩擦焊接研究現(xiàn)狀與展望FRICTION STIR WELDING OF MAGNESIUM ALLOYS：A REVIEW

近年來，鎂合金在汽車、軌道交通、航空航天等領(lǐng)域的應(yīng)用需求快速增長，其可靠連接的重要性愈發(fā)突出。作為固相焊接技術(shù)，攪拌摩擦焊（FSW）對鎂合金焊接具有獨特優(yōu)勢，因此得到了廣泛關(guān)注。本文重點綜述了鎂合金常規(guī)對接FSW的研究進(jìn)展，就焊接工藝、微觀組織演化、織構(gòu)分布特征、接頭力學(xué)性能及其之間的相互作用機(jī)制進(jìn)行了詳細(xì)分析與評述。研究表明，不同于鋁合金，在變形鎂合金FSW時，織構(gòu)是影響接頭性能的關(guān)鍵因素，焊后形成的特殊強(qiáng)織構(gòu)分布是導(dǎo)致接頭難與母材等強(qiáng)的主要原因。同時，對其它焊接形式如搭接焊、點焊、雙面焊的可焊性及接頭性能的影響因素與變化規(guī)律進(jìn)行了討論，并對鎂合金與其它鎂合金、鋁合金以及鋼之間異種焊的可焊性、界面結(jié)合機(jī)制、接頭性能的影響因素及調(diào)控方法進(jìn)行了評述。最后，對鎂合金FSW的未來研究方向進(jìn)行了展望。

In recent years, the increasing application demand for Mg alloys in automobile, rail transport, aviation and aerospace industries brings about the growing prominence of seeking reliable techniques to join Mg alloys. As a solid state welding method, friction stir welding (FSW) exhibits unique advantages in joining Mg alloys, and thus arouses widespread research interest. This paper emphatically reviewed the research status of conventional friction stir butt-welding of Mg alloys, and highlighted the welding process, microstructure evolution, texture characteristics, mechanical behavior and their interaction mechanism. It was indicated that the texture plays a vital role in FSW joint performance of wrought Mg alloys, which is quite different from that in the FSW Al alloy joints. The specific strong texture formed in the weld is the main factor that gives rise to the impediment to achieving equal-strength joints to base materials. At the same time, some focuses like the weldability and the factors that influence joint performance in other types of FSW like lap welding, spot welding and double-sided welding; the weldability, interface bonding mechanism, joint performance and its affecting factors and optimization methods in dissimilar FSW between Mg alloys and other materials like Mg alloys of other grades, Al alloys and steels, were summarized and discussed. Finally, the future research and development directions in FSW of Mg alloys were prospected.

全文下載：https://pan.baidu.com/s/1qrJNMk5HVjXFbnq6tUe2ng?

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