1. Singapore Centre for 3D Printing School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
2. HP–NTU Digital Manufacturing Corporate Lab School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
3. State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China
4. School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China
5. State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 China
6. Department of Mechanical Engineering Stanford University Stanford CA 94305 USA
7. School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA