Study on the Microstructure and Properties of Zl114a Friction Stir Welded Joint with Forced Cooling

Abstract:

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ZL114A was joined by friction stir welding and liquid nitrogen was used to cool the welded joint during the welding process. The Influence of forced cooling on the microstructure and properties of welded jointed was studied. The results show that, when forced cooling is used, the amount of silicon particles in weld nugget zone is larger and the size is more homogeneous, the size of silicon particle in heat-mechanical affected zone is more fine , the grain size of heat affected zone is half of air cooling welded joint and the amount of Al-Si eutectic is smaller than air cooling welded joint. The micro hardness increases after forced cooling is used, the hardness of weld nugget zone is 20Hv higher than air cooling welded joint. The strength of forced cooling welded joint increases 13.6% than air cooling welded joint.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

3335-3338

DOI:

10.4028/www.scientific.net/AMR.189-193.3335

Citation:

G. P. Liu et al., "Study on the Microstructure and Properties of Zl114a Friction Stir Welded Joint with Forced Cooling", Advanced Materials Research, Vols. 189-193, pp. 3335-3338, 2011

Online since:

February 2011

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Price:

$35.00

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