TY - JOUR
T1 - Weakest region analysis of non-combustible Mg products fabricated by selective laser melting
AU - Proaño, Bryan
AU - Miyahara, Hirofumi
AU - Matsumoto, Toshiharu
AU - Hamada, Shigeru
AU - Sakai, Hitoshi
AU - Ogawa, Kiyoshi
AU - Suyalatu,
AU - Noguchi, Hiroshi
N1 - Funding Information:
One of the authors (Bryan Proaño) gratefully acknowledges the financial support provided by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT), Japan . This work was financially supported by the Kitakyushu Foundation for the Advancement of Industry, Science and Technology (FAIS), Japan .
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10
Y1 - 2019/10
N2 - In this study, several Mg-9%Al-2%Ca alloy specimens were made using selective laser melting process (SLM) and subsequently subjected to tensile testing. Results showed that the microstructure of this specimen consist of fine grain, which serves to harden the material, and coarse grain, which is defined by the relatively slowly cooled region, softening the material and increasing its plasticity. The coarse grain tended to preferentially solidify immediately below the outer surface of the sample, which could lead to a stable crack propagation that originated from a defect located at the surface as a consequence of the intrinsic irregularity of SLM processes, the effects of which must be considered in order to determine the fracture toughness. Based on this information, corresponding measures can be provided in order to improve the process stability for non-combustible magnesium products.
AB - In this study, several Mg-9%Al-2%Ca alloy specimens were made using selective laser melting process (SLM) and subsequently subjected to tensile testing. Results showed that the microstructure of this specimen consist of fine grain, which serves to harden the material, and coarse grain, which is defined by the relatively slowly cooled region, softening the material and increasing its plasticity. The coarse grain tended to preferentially solidify immediately below the outer surface of the sample, which could lead to a stable crack propagation that originated from a defect located at the surface as a consequence of the intrinsic irregularity of SLM processes, the effects of which must be considered in order to determine the fracture toughness. Based on this information, corresponding measures can be provided in order to improve the process stability for non-combustible magnesium products.
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U2 - 10.1016/j.tafmec.2019.102291
DO - 10.1016/j.tafmec.2019.102291
M3 - Article
AN - SCOPUS:85068506967
VL - 103
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
M1 - 102291
ER -