Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis-Reference-Cited by-同舟云学术

Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis

Published:2023-09-29 Issue:19 Volume:16 Page:6494
ISSN:1996-1944
Container-title:Materials
language:en
Short-container-title:Materials

Author:

Habiba Ummay¹²^ORCID,Hebert Rainer J.¹²³

Affiliation:

1. Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA

2. Pratt & Whitney Additive Manufacturing Center, University of Connecticut, Storrs, CT 06269, USA

3. Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA

Abstract

The thermal diffusivity of powder bed plays a crucial role in laser powder bed fusion (LPBF) additive manufacturing. The mechanical properties of the parts built by LPBF are immensely influenced by the thermal properties of the powder bed. This study aims to measure the thermal diffusivity of metallic powder, nickel-based super alloy Inconel718 (IN718), in LPBF using laser flash three-layered analysis in a DLF1600 instrument, which incorporates a special powder cell to encapsulate the powdered sample. Measurements were performed at different temperatures. The thermal diffusivity of several reference samples was measured for the purpose of validating the test results, and it was compared to published data for identical measures. It was observed that experimental results for powder samples were smaller than the actual thermal diffusivity of the sample. R software analysis was used to analyze test data in order to obtain powder thermal diffusivity values that were close to the actual values.

Funder

Air Force Research Laboratory, Materials and Manufacturing Directorate

Publisher

MDPI AG

Subject

General Materials Science

Link

https://www.mdpi.com/1996-1944/16/19/6494/pdf

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