Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (4): 528-538.DOI: 10.1007/s40195-019-00974-4
• Orginal Article • Previous Articles Next Articles
Mohamad Ebrahimnia1, Yujiang Xie1(), Changtai Chi2
Received:
2019-05-24
Revised:
2019-07-25
Online:
2020-04-10
Published:
2020-04-15
Contact:
Yujiang Xie Mohamad Ebrahimnia, Yujiang Xie, Changtai Chi. Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 528-538.
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Fig. 3 Micrographs of the top layers of DLMD samples: a L500, b L700, c L900, d L1100. Granular bainite (GB), coalesced bainite (CB), Widmanstatten ferrite (WF), proeutectoid ferrite (F)
Fig. 4 Micrographs of the middle layers of DLMD samples: a L500, b L700, c L900, d L1100. Granular bainite (GB), proeutectoid ferrite (PF), equiaxed ferrite (F), pearlite (P)
Fig. 5 Micrographs of the top layers of DLMD samples: a AR500, b AR700, c AR900, d AR1100. Granular bainite (GB), proeutectoid ferrite (PF), Widmanstatten ferrite (WF), pearlite (P), lath bainite (LB)
Fig. 6 Micrographs of the middle layers of DLMD samples: a AR500, b AR700, c AR900, d AR1100. Granular bainite (GB), proeutectoid ferrite (PF), pearlite (P)
Fig. 9 SEM images of DLMD samples: a AR500, b AR700 top layer, c AR700 middle layer. Lath bainite (LB), granular bainite (GB), proeutectoid ferrite (PF), martensite (M), Widmanstatten ferrite (WF), martensite-austenite constitutes (M-A)
Fig. 14 Shapes and morphologies of voids in DLMD samples: a, b sample L500, c, d sample AR500. The black arrows show unmelted powder particles inside voids
Fig. 15 Fracture surfaces of tensile test samples: a sample L500 consists of ductile fracture accompanied by some holes and cleavage fracture beside holes, b sample L1100 has complete ductile fracture mode, c oxide particle leads to the void formation in the sample
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