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Wire-arc additive manufacturing of Al-Zn5.5-Mg-Cu (ML7075): Shifting paradigms of additive manufacture-ability

Materials Letters, ISSN: 0167-577X, Vol: 313, Page: 131841
2022
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Article Description

Al-Zn-Mg-Cu alloys belong to the highest-performing aluminum alloys and are in focus for processing by additive manufacturing with limited success so far. The reason is that these alloys severely tend to hot-cracking. We present results of microstructure and mechanical properties after wire-arc additive manufacturing of an AlZn5.5MgCu alloy. Specimens are crack-free and reach mechanical property values similar to wrought AlZn5.5MgCu. We suggest that the intrinsic heat-treatment affects the processability of this alloy.

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