Liquidmetal Technologies Inc (LQMT)

[JoTu]

https://www.researchgate.net/publication/308519520_Selective_Laser_Melting_of_Zr-based_Bulk_Metallic_Glasses_Processing_Microstructure_and_Mechanical_Properties

2. Experimental procedures
2.1. Gas-atomisation and selective laser melting (SLM)
Master ingot with a nominal composition of Zr52.5Ti5Cu17.9Ni14.6Al10 (in at.%) was supplied by Liquidmetal® Technologies, Inc. under the trade name LM105. The powder used was produced using electrode in- duction melting gas atomization (EIGA) and was below 106 µm in diam- eter(D10 =30µm,D50 =61µmandD90 =108µm),whichwas obtained through sieving the as-atomised powder.

5. Conclusion
In this study, a large scale, complex and fully dense crack-free Zr52.5Ti5Cu17.9Ni14.6Al10 BMG was successfully fabricated through SLM. The influence of processing parameters on the microstructure and me- chanical properties of the fabricated BMGs were systematically investi- gated. The following points are drawn from this study:

https://www.researchgate.net/publication/312421074_3D_printing_of_large_complex_metallic_glass_structures

3. Experiment and testing
In this study, 100 µm-thick LM105 (Zr52.5Ti5Al10Ni14.6Cu17.9 (at.%)) amorphous foils were selected for welding onto 0.75 mm-thick LM105 amorphous plates, both are provided by Liquidmetal Technologies, Inc.

Fig. 5 illustrates the top and cross-section views of the 10 mm sam- ple as shown in Fig. 4. As can be seen in Fig. 5(a), the overlap of two laser spots is about 67%. The inset of Fig. 5(a) shows the welding “jumping” sequence which was designed to prevent heat accumulation at any loca- tion (i.e., increase the CR). From Fig. 5(b), no cracks or pores are found. The density of the tested part was measured using the Archimedes' method which is 6.607 g/cm3. This value is close to the original foil den- sity of 6.57 g/cm3 provided by Liquidmetal Technologies, Inc. and 6.599 g/cm3 tested by us.

Fig. 6 shows the comparison of DSC test results between the as-re- ceived plate and the LFP fabricated test part at a heating rate of 20 °C/ min from room temperature to 600 °C. The sample part (Curve 2) showsTg ˜400°CandTx1 ˜469°CandTx2 ˜479°C.Theyareclose to what were reported from Liquidmetal Technologies, Inc.: Tg =

Acknowledgements
This work was supported by the Department of Energy (Grant No. DE-FE0012272) and the University of Missouri (Award No: FastTrack- 16002R). The authors acknowledge the valuable comments on this pa- per made by Dr. Stephanie O'Keeffe at Liquidmetal Technologies, Inc.