Hot cracking in laser welding of Hastelloy X with pulsed Nd:YAG and continuous wave fiber lasers
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- 作者：M. Pakniata ; mortezapakniat@gmail.com" class="auth_mail" title="E-mail the corresponding author ; F. Malek Ghainia ; fmalek@modares.ac.ir" class="auth_mail" title="E-mail the corresponding author ; M.J. Torkamanyb ; mjtorkamany@yahoo.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：Hastelloy X ; Laser welding ; Pulsed Nd ; YAG laser ; Continuous wave fiber laser ; Hot cracking
- 刊名：Materials & Design
- 出版年：2016
- 出版时间：15 September 2016
- 年：2016
- 卷：106
- 期：Complete
- 页码：177-183
- 全文大小：1700 K
文摘
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Total solidification and liquation cracks remarkably reduced with increasing pulse frequency and pulse duration.
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Increasing the pulse frequency changes the tendency of solidification cracks to connect to liquation cracks inside the HAZ.
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All the hot cracks eliminated when the laser source for welding changed to continuous wave fiber laser.
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A deeper weld penetration obtained with continuous wave fiber laser at low heat inputs.