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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

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ISSN Druckformat: 1093-3611

ISSN Online: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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PREDICTION OF THERMAL HISTORY IN LASER METAL DEPOSITION

Volumen 22, Ausgabe 1, 2018, pp. 47-62
DOI: 10.1615/HighTempMatProc.2018026699
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ABSTRAKT

The mechanical behavior of the part produced by laser metal deposition (LMD) depending on the thermal history-based microstructure (resulting anisotropic properties) is not fully understood at present. A numerical model that is adequate for predicting thermal history, including melt pool size, thermomechanical residual stress distribution, temperature profile for single layer, multilayer having different track and real-time material addition during laser metal deposition process has been developed in the present study. In addition, the effect of surface tension on the droplet shape with and without solidification is also predicted by the developed numerical model. The simulated and measured thermal history indicated that the absorption and loss of heat tended to be close to equilibrium when the deposited material reached a certain height (found in simulation) during the LMD process. The melt pool length increases from 1.6 mm at the 1st layer to 3.2 mm at the 17th layer. The stress was measured at the base of the deposited part; it was found that the peak of the stress goes up to 1800 MPa during simulation at the corners of the deposited part and at the end of simulation it decreases to 320 MPa. Then it was cooled to room temperature, and residual stress was found to be equal to 175 MPa.

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