| Autor: |
WEI Zhu-shi, CUI Li, HE Ding-yong, WANG Zhi-hui, CHEN Li |
| Jazyk: |
čínština |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Cailiao gongcheng, Vol 46, Iss 7, Pp 113-120 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1001-4381 |
| DOI: |
10.11868/j.issn.1001-4381.2016.001504 |
| Popis: |
A laser keyhole welding process was performed to join of 6mm thick aluminum (Al) alloys to steel plates in a butt configuration without any filler materials. High quality metallurgical bonding joints were produced by controlling welding parameters.The effect of different laser beam effsets and different locations of joints on the morphology, phase components and thickness of the intermetallic compound (IMC) layers was investigated by using optical microscope (OM) and electron backscatter diffraction (EBSD) analysis technology. The results show that the main phases of IMC layers are composed of η-Al5Fe2 and θ-Al13Fe4 phases. The laser beam offsets have an important influence not only on the average thickness of IMC layers but also on the IMC grain size:increasing laser beam offsets significantly reduces the amount of needle-like θ-Al13Fe4 phases, refines the grain sizes of η-Al5Fe2 layers, and decreases the average thickness of η-Al5Fe2 layers at the interfaces. In considering the influence of the different locations through the steel/Al alloy joint, under the conditions of two laser beam offsets, the minimum grain size and thickness of η-Al5Fe2 layers have been obtained at the middle part of the steel/Al alloy joints. In addition, it shows clearly that the θ-Al13Fe4 phases are generated between the η-Al5Fe2 layers and the steel substrates are confirmed by the EBSD phase analysis. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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