|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Microstructure Control in Additive Manufacturing of Aluminum Alloys
||Hunter Martin, Brennan Yahata, Eric Clough, Jacob Hundley, Tobias Schaedler, Tresa Pollock
|On-Site Speaker (Planned)
Additive Manufacturing of aluminum alloys has been limited to a select group of weldable Al-Si alloys, however many applications require materials with significantly higher strength. Standard high strength aluminum alloys, 2000 and 7000 series, suffer from hot tearing during solidification making them unsuitable for processing in additive manufacturing. We have developed modeling techniques to identify alloys susceptible to hot tearing and mechanisms to reduce this tendency in the unique solidification conditions during direct laser melting. By modifying material feedstock and controlling processing parameters, the hot tear susceptibility can be reduced. In addition, the microstructure and mechanical properties of additively manufacture aluminum alloys can be optimized. Through simulations the optimum solidification path can identified and parameters are tailored to control solidification of the melt pool accordingly. We will show that application of this process can be used to enable additive manufacturing of new high strength aluminum alloy systems.
||Planned: Supplemental Proceedings volume