|本期目录/Table of Contents|

Modeling thermal and mechanical cancellation of residual stress from hybrid additive manufacturing by laser peening(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2019年2期
页码:
49-60
栏目:
出版日期:
2019-06-15

文章信息/Info

Title:
Modeling thermal and mechanical cancellation of residual stress from hybrid additive manufacturing by laser peening
作者:
Guru Madireddy a Chao Li b Jingfu Liu c Michael P. Sealy a*
a Mechanical and Materials Engineering Department, University of Nebraska, Lincoln, NE, 68588, USA
b Autodesk Inc., 200 Innovation Blvd. Suite 208, State College, PA 16803, USA
Author(s):
Guru Madireddy a Chao Li b Jingfu Liu c Michael P. Sealy a*
关键词:
Additive manufacturing
Laser peening

Finite element analysis

Residual stress

Hybrid
Keywords:
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分类号:
-
DOI:
-
文献标识码:
A
摘要:
Additive manufacturing (AM) of metals often results in parts with unfavorable mechanical properties. Laser peening (LP) is a high strain rate mechanical surface treatment that hammers a workpiece and induces favorable
mechanical properties. Peening strain hardens a surface and imparts compressive residual stresses improving the mechanical properties of a material. This work investigates the role of LP on layer-by-layer processing of 3D
printed metals using
fi nite element analysis. The objective is to understand temporal and spatial residual stress development after thermal and mechanical cancellation caused by cyclically coupling printing and peening. Results indicate layer peening frequency is a critical process parameter affecting residual stress redistribution and highly interdependent on the heat generated by the printing process. Optimum hybrid process conditions were found to exists that favorably enhance mechanical properties. With this study, hybrid-AM has ushered in
the next evolutionary step in AM and has the potential to profoundly change the way high value metal goods are manufactured.
Abstract:
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参考文献/References

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备注/Memo

备注/Memo:
Corresponding author.
E-mail address: sealy@unl.edu (M.P. Sealy).
更新日期/Last Update: 2019-10-20