A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes
The influence of different heat treatment processes on the microstructure and mechanical properties of 18Ni300 stainless steel manufactured by selective laser melting has been investigated in the present study. The microstructures, nanoprecipitates, and mechanical properties of the differently heat-...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-11-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424020593 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850253332632829952 |
|---|---|
| author | Yaxin Ma Yifei Gao Hong Zhang Zhengxing Men Lixia Yang |
| author_facet | Yaxin Ma Yifei Gao Hong Zhang Zhengxing Men Lixia Yang |
| author_sort | Yaxin Ma |
| collection | DOAJ |
| description | The influence of different heat treatment processes on the microstructure and mechanical properties of 18Ni300 stainless steel manufactured by selective laser melting has been investigated in the present study. The microstructures, nanoprecipitates, and mechanical properties of the differently heat-treated samples were analyzed using various precision instruments. Compared with a non-treated 18Ni300 stainless steel sample, the results showed that the microstructure was mainly composed of fine lath-like martensite, with a large number of nano-precipitates dispersed both within the martensite and in the boundaries. In addition, there was a preserved amount of austenite between the lath-like martensite and the spherical nanoprecipitate in the SAT sample. The interactions between the martensite matrix and the nanoprecipitates and dislocations were assumed to be the main reason for the high strength of 18Ni300 stainless steel. These precipitates included rod-shaped or needle-shaped, Ni3Ti, Ni3Mo, and Ni3(Ti, Mo) nano-precipitates, as well as spherical Ti–Al nano-oxidized precipitates and massive Ni-rich precipitates. The shear and by-pass mechanisms between the strengthened nano-precipitate and the dislocations were found to depend on the size of the nanoprecipitate. The influence of the nanoprecipitation on the indentation hardness became more evident after heat treatment, but the effect on the indentation modulus was not that obvious. The AT- and SAT-treatments significantly improve the strength, hardness, and modulus of samples but were found to reduce the toughness and plasticity. After the AT- and SAT-treatments, the protrusions became smaller, and the small isometric protrusion of a shear lip became significantly smaller than for the as-built material. |
| format | Article |
| id | doaj-art-9243b351aa244e2880bdb00a8fe2c890 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-9243b351aa244e2880bdb00a8fe2c8902025-08-20T01:57:25ZengElsevierJournal of Materials Research and Technology2238-78542024-11-0133516010.1016/j.jmrt.2024.09.054A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processesYaxin Ma0Yifei Gao1Hong Zhang2Zhengxing Men3Lixia Yang4Chengdu Aeronautic Polytechnic, Chengdu, 610100, China; Central Iron & Steel Research Institute, Beijing, 100081, China; Corresponding author. Chengdu Aeronautic Polytechnic, Chengdu, 610100, China.Central Iron & Steel Research Institute, Beijing, 100081, China; NCS Testing Technology Co., Ltd., Beijing, 100081, China; Corresponding author. Central Iron & Steel Research Institute, Beijing, 100081, China.Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, College of Architecture and Environment, Sichuan University, Chengdu, 610065, ChinaChengdu Aeronautic Polytechnic, Chengdu, 610100, ChinaCentral Iron & Steel Research Institute, Beijing, 100081, China; NCS Testing Technology Co., Ltd., Beijing, 100081, ChinaThe influence of different heat treatment processes on the microstructure and mechanical properties of 18Ni300 stainless steel manufactured by selective laser melting has been investigated in the present study. The microstructures, nanoprecipitates, and mechanical properties of the differently heat-treated samples were analyzed using various precision instruments. Compared with a non-treated 18Ni300 stainless steel sample, the results showed that the microstructure was mainly composed of fine lath-like martensite, with a large number of nano-precipitates dispersed both within the martensite and in the boundaries. In addition, there was a preserved amount of austenite between the lath-like martensite and the spherical nanoprecipitate in the SAT sample. The interactions between the martensite matrix and the nanoprecipitates and dislocations were assumed to be the main reason for the high strength of 18Ni300 stainless steel. These precipitates included rod-shaped or needle-shaped, Ni3Ti, Ni3Mo, and Ni3(Ti, Mo) nano-precipitates, as well as spherical Ti–Al nano-oxidized precipitates and massive Ni-rich precipitates. The shear and by-pass mechanisms between the strengthened nano-precipitate and the dislocations were found to depend on the size of the nanoprecipitate. The influence of the nanoprecipitation on the indentation hardness became more evident after heat treatment, but the effect on the indentation modulus was not that obvious. The AT- and SAT-treatments significantly improve the strength, hardness, and modulus of samples but were found to reduce the toughness and plasticity. After the AT- and SAT-treatments, the protrusions became smaller, and the small isometric protrusion of a shear lip became significantly smaller than for the as-built material.http://www.sciencedirect.com/science/article/pii/S223878542402059318Ni300 stainless steelSelective laser meltingHeat treatmentMicrostructureMechanical properties |
| spellingShingle | Yaxin Ma Yifei Gao Hong Zhang Zhengxing Men Lixia Yang A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes Journal of Materials Research and Technology 18Ni300 stainless steel Selective laser melting Heat treatment Microstructure Mechanical properties |
| title | A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes |
| title_full | A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes |
| title_fullStr | A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes |
| title_full_unstemmed | A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes |
| title_short | A comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18Ni300 stainless steel during heat treatment processes |
| title_sort | comprehensive study on the microstructure evolution and mechanical property characterization of selective laser melted 18ni300 stainless steel during heat treatment processes |
| topic | 18Ni300 stainless steel Selective laser melting Heat treatment Microstructure Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424020593 |
| work_keys_str_mv | AT yaxinma acomprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT yifeigao acomprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT hongzhang acomprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT zhengxingmen acomprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT lixiayang acomprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT yaxinma comprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT yifeigao comprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT hongzhang comprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT zhengxingmen comprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses AT lixiayang comprehensivestudyonthemicrostructureevolutionandmechanicalpropertycharacterizationofselectivelasermelted18ni300stainlesssteelduringheattreatmentprocesses |