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Published on: September 18, 2018
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The Hardness of Additively Manufactured Alloys
1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA. jsz125@psu.edu.
Materials (Basel, Switzerland)
|October 27, 2018
Summary
This study synthesizes fragmented data on metallic components made by additive manufacturing (AM). Reviewing hardness data reveals key insights into process variables and alloy selection for achieving target properties.
Area of Science:
- Materials Science
- Metallurgy
- Manufacturing Engineering
Background:
- Additive manufacturing (AM) of metallic components is rapidly advancing.
- Published data on AM material properties, like hardness, are often fragmented.
- A comprehensive review is needed to extract critical insights from existing research.
Purpose of the Study:
- To critically assess and synthesize fragmented hardness data for additively manufactured metallic components.
- To investigate the influence of cooling rate, microstructure, alloy composition, and heat treatment on hardness.
- To compare AM and welding processes for steels and aluminum alloys regarding hardness.
Main Methods:
- Systematic review and critical analysis of published hardness data for AM metallic components.
- Examination of factors including cooling rate, microstructure, alloy composition, and post-process heat treatment.
- Comparative analysis of hardness data between AM and welding for specific alloys.
Main Results:
- Consolidated insights into the relationship between process variables and hardness in AM metals.
- Identification of key factors influencing the hardness of aluminum, nickel, titanium, and iron-based alloys.
- Comparative understanding of hardness achieved through AM versus traditional welding techniques.
Conclusions:
- Synthesized data provide a clearer picture of hardness in AM metallic parts than individual studies.
- Findings aid in optimizing AM process parameters and alloy selection for desired hardness.
- The study highlights the potential for achieving target hardness through controlled manufacturing and material choices.
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