Softening Mechanism in Heat Affected Zone of 2519 High Strength Al-Cu Alloy

Cheng Gang Yang; Qiang Zhen; Zhi Jiang Huang; Wei Ping Xu

doi:10.4028/www.scientific.net/MSF.749.387

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HomeMaterials Science ForumMaterials Science Forum Vol. 749Softening Mechanism in Heat Affected Zone of 2519...

Softening Mechanism in Heat Affected Zone of 2519 High Strength Al-Cu Alloy

Abstract:

With the thermal simulated technique, the softening mechanism in heat affected zone (HAZ) of 2519 Al-Cu Alloy is studied. The results show that over aging of the precipitates leads θ' to the softening of HAZ. With the thermal cycling peak temperature increasing, the dimension of precipitates become coarse and the amount is reduced, therefore the strength and the hardness decreased. When the peak temperature is 476, the strength and the hardness are the lowest. With the peak temperature keeps on increasing, small part precipitates continue to grow. Most of fine needle-like θ' phases dissolve and separate out renewably, which is the reason that the strength and hardness are gradually enhanced.

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Periodical:

Materials Science Forum (Volume 749)

Pages:

387-391

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.749.387

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Online since:

March 2013

Authors:

Cheng Gang Yang, Qiang Zhen, Zhi Jiang Huang, Wei Ping Xu

Keywords:

Al-Cu Alloys, Heat Affected Zone (HAZ), Precipitate, Thermal Cycle Curve

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