[Kovove materialy - Metallic materials]
    Fri - October 20, 2017 - 16:03 No. of hits : 863193 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 55 (2017), Issue 5

Study on precipitated phases, dislocations and hardness in the HAZ of friction stir welded joint of 2024 aluminum alloy
PENG LIU, KEYUN FENG, SHUBO XU, GEMING ZHANG, MEIQING CAO, JIANING LI, CHUANWEI SHI
vol. 55 (2017), no. 5,

Abstract
The microhardness, precipitated phases and dislocations in the heat-affected zone of friction stir welded joints of 2024 aluminum alloys were observed and analyzed by transmission electron microscopy. The test result indicated that there were some block precipitation particles, Al7Cu3Mg6 phase, in the HAZ close to advancing side. The precipitated phases, AlCu3 phase, can be observed in the HAZ close to retreating side. Al7Cu3Mg6 phase could enhance the hardness in the advancing side of joint. After FSW, AlCu3 precipitated phase and high-density dislocations were divided into some fine particles and the lower dislocation density regions, respectively. As a result, the hardness in this region showed the lowest value.

Key words
aluminum alloys, friction stir welding, heat-affected zone, microstructure

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


Article abstracts updated: 2017-09-26 11:15     
Articles in press revised: 2017-10-18 14:20    
Full text pdf uploaded: 2017-08-18 08:43   
Information updated: 2017-05-10 17:18  

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