A Simplified Methodology for Estimating Residual Stresses in Powder-Bed Electron Beam Additive Manufacturing
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- Tadano Satoshi
- Power and Industrial Systems R&D Center, Toshiba Corporation
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- Okano Shigetaka
- Division of Materials and Manufacturing Science, Osaka University
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- Hino Takehisa
- Power and Industrial Systems R&D Center, Toshiba Corporation
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- Ohnishi Haruki
- Power and Industrial Systems R&D Center, Toshiba Corporation
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- Mochizuki Masahito
- Division of Materials and Manufacturing Science, Osaka University
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- Nakatani Yujiro
- Power and Industrial Systems R&D Center, Toshiba Corporation
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抄録
<p>In regard to the dimensional accuracy of additive manufactured parts, the prediction and control of residual stresses constitute a challenging issue. The objective of this research is to develop a simplified method of estimating residual stresses in powder-bed electron beam additive manufacturing (EBAM). We propose a model in which residual stresses arise from thermal strains during the cooling step, and confirmed the validity of the model by X-ray diffraction using the sin2ψ method and the modified internal residual stress method. The stress distribution of the model showed good agreement with the experiment except in local areas such as the side of the additive layer and the interface with the base plate. We clarified that the residual stresses of manufactured parts in powder-bed EBAM can be mostly estimated by thermal strains induced in the additive layer and the base plate during cooling step.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 59 (3), 420-424, 2018
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679230723968
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- NII論文ID
- 130006400680
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 028849624
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可