Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel
In this paper, in situ observation of the cooling process of the deposited metal of low nickel high nitrogen austenitic stainless steel obtained by laser-arc hybrid surfacing welding with shielding gas containing only Ar and only N2, respectively, is carried out using the ultra-high-temperature conf...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/7655423 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849407787191238656 |
|---|---|
| author | Yiming Ma Xiaochun Lv Naiwen Fang Kai Xu Xingxing Wang Yicheng Yang Hongliang An Yan Zhang Yinan Xu |
| author_facet | Yiming Ma Xiaochun Lv Naiwen Fang Kai Xu Xingxing Wang Yicheng Yang Hongliang An Yan Zhang Yinan Xu |
| author_sort | Yiming Ma |
| collection | DOAJ |
| description | In this paper, in situ observation of the cooling process of the deposited metal of low nickel high nitrogen austenitic stainless steel obtained by laser-arc hybrid surfacing welding with shielding gas containing only Ar and only N2, respectively, is carried out using the ultra-high-temperature confocal laser scanning microscope (CLSM). An in-depth analysis of the microstructural changes is conducted with SEM, EDS, and EBSD. The results showed that the surface substructure is refined during crystallization with shielding gas Ar. However, grains are seriously coarsened in the δ phase area. Widmanstatten γ and intragranular γ are formed as a result of δ ⟶ γ phase transition through the shear-diffusion mechanism. In the cooling process with shielding gas N2, the temperature range of each phase area narrowed obviously. Blocky γ began to appear because of the δ ⟶ γ phase transition through the diffusion mechanism. Generally, Ar and N2 have a strong effect only on the very shallow range from the surface. The area with a larger local misorientation with shielding gas Ar is at lath γ on the surface. With shielding gas N2, the large local misorientation area is the last contact position of γ during the δ ⟶ γ phase transition on the surface and cross section. |
| format | Article |
| id | doaj-art-4344df20f3b94b7db63552525feab392 |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-4344df20f3b94b7db63552525feab3922025-08-20T03:35:57ZengWileyAdvances in Materials Science and Engineering1687-84422021-01-01202110.1155/2021/7655423Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless SteelYiming Ma0Xiaochun Lv1Naiwen Fang2Kai Xu3Xingxing Wang4Yicheng Yang5Hongliang An6Yan Zhang7Yinan Xu8Harbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyNorth China University of Water Resources and Electric PowerHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyIn this paper, in situ observation of the cooling process of the deposited metal of low nickel high nitrogen austenitic stainless steel obtained by laser-arc hybrid surfacing welding with shielding gas containing only Ar and only N2, respectively, is carried out using the ultra-high-temperature confocal laser scanning microscope (CLSM). An in-depth analysis of the microstructural changes is conducted with SEM, EDS, and EBSD. The results showed that the surface substructure is refined during crystallization with shielding gas Ar. However, grains are seriously coarsened in the δ phase area. Widmanstatten γ and intragranular γ are formed as a result of δ ⟶ γ phase transition through the shear-diffusion mechanism. In the cooling process with shielding gas N2, the temperature range of each phase area narrowed obviously. Blocky γ began to appear because of the δ ⟶ γ phase transition through the diffusion mechanism. Generally, Ar and N2 have a strong effect only on the very shallow range from the surface. The area with a larger local misorientation with shielding gas Ar is at lath γ on the surface. With shielding gas N2, the large local misorientation area is the last contact position of γ during the δ ⟶ γ phase transition on the surface and cross section.http://dx.doi.org/10.1155/2021/7655423 |
| spellingShingle | Yiming Ma Xiaochun Lv Naiwen Fang Kai Xu Xingxing Wang Yicheng Yang Hongliang An Yan Zhang Yinan Xu Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel Advances in Materials Science and Engineering |
| title | Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel |
| title_full | Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel |
| title_fullStr | Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel |
| title_full_unstemmed | Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel |
| title_short | Research on Microstructure Evolution of Deposited Metal of Low Nickel High Nitrogen Austenitic Stainless Steel |
| title_sort | research on microstructure evolution of deposited metal of low nickel high nitrogen austenitic stainless steel |
| url | http://dx.doi.org/10.1155/2021/7655423 |
| work_keys_str_mv | AT yimingma researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT xiaochunlv researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT naiwenfang researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT kaixu researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT xingxingwang researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT yichengyang researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT hongliangan researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT yanzhang researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel AT yinanxu researchonmicrostructureevolutionofdepositedmetaloflownickelhighnitrogenausteniticstainlesssteel |