Laser beam profile modulation for microstructure control in laser cladding of an NiCrBSi alloy
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- 作者：S. Shang ; Dan Wellburn ; dan@atm.neu.edu.cn" class="auth_mail ; Y.Z. Sun ; S.Y. Wang ; J. Cheng ; J. Liang ; C.S. Liu
- 关键词：Laser cladding ; Beam shaping ; Melt pool ; Microstructure ; Cooling rate ; NiCrBSi
- 刊名：Surface and Coatings Technology
- 出版年：15 June 2014
- 年：2014
- 卷：248
- 期：Complete
- 页码：46-53
- 全文大小：4004 K
文摘
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Laser cladding of a NiCrBSi based superalloy is carried out.
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Non-conventional beam intensity profiles are compared with a traditional profile.
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The homogeneity of the microstructure is affected by the beam intensity profile.
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The most effective beam profile is that with a greater intensity at its outer edge.
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Homogenisation of the microstructure and moderation of dendrite size was achieved.