Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content
By means of microstructure observation on Hf-containing K416B Ni-based superalloy with high W-content after solid solution heat treatment at different temperatures, the effect of solid solution temperature on microstructure of the alloy was investigated. The results show that with the increasing of...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Aeronautical Materials
2019-06-01
|
| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/CN/Y2019/V39/I3/62 |
| _version_ | 1819099705682952192 |
|---|---|
| author | HOU Guichen SU Haijun XIE Jun XUN Shuling YU Jinjiang SUN Xiaofeng ZHOU Yizhou |
| author_facet | HOU Guichen SU Haijun XIE Jun XUN Shuling YU Jinjiang SUN Xiaofeng ZHOU Yizhou |
| author_sort | HOU Guichen |
| collection | DOAJ |
| description | By means of microstructure observation on Hf-containing K416B Ni-based superalloy with high W-content after solid solution heat treatment at different temperatures, the effect of solid solution temperature on microstructure of the alloy was investigated. The results show that with the increasing of solid solution temperature, the size of secondary dendrite increases slightly by element diffusion, and the eutectic content decreases gradually to promote the densification of alloy microstructure. In addition, the γ′ phase is dissolved into the matrix, and its size is decreased. During high temperature solid solution heat treatment, the primary strip <i>M</i>C phase in the inter-dendrite is decomposed to form granular <i>M</i><sub>6</sub>C carbides, while the morphology and quantity of large sized block <i>M</i><sub>6</sub>C phase in eutectic have no obvious change. The solid solution treatment causes that the element W is segregated in the dendrites to diffuse into inter-dendrites, and elements of Hf，Nb，Ti and Cr diffuse into the dendrites, the segregation degree of each element of the alloy is greatly reduced. The results of microstructure research indicate that the optimal solid-solution heat treatment process for the alloy is 1220 ℃ × 4 h. |
| first_indexed | 2024-12-22T00:51:08Z |
| format | Article |
| id | doaj.art-93393a3295814820925bac4485b88050 |
| institution | Directory Open Access Journal |
| issn | 1005-5053 1005-5053 |
| language | zho |
| last_indexed | 2024-12-22T00:51:08Z |
| publishDate | 2019-06-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-93393a3295814820925bac4485b880502022-12-21T18:44:26ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50531005-50532019-06-01393626810.11868/j.issn.1005-5053.2018.000086201903000086Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-contentHOU Guichen0SU Haijun1XIE Jun2XUN Shuling3YU Jinjiang4SUN Xiaofeng5ZHOU Yizhou6Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaNorthwestern Polytechnical University, State Key Laboratory of Solution Processing, Xi’an 710072, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaBy means of microstructure observation on Hf-containing K416B Ni-based superalloy with high W-content after solid solution heat treatment at different temperatures, the effect of solid solution temperature on microstructure of the alloy was investigated. The results show that with the increasing of solid solution temperature, the size of secondary dendrite increases slightly by element diffusion, and the eutectic content decreases gradually to promote the densification of alloy microstructure. In addition, the γ′ phase is dissolved into the matrix, and its size is decreased. During high temperature solid solution heat treatment, the primary strip <i>M</i>C phase in the inter-dendrite is decomposed to form granular <i>M</i><sub>6</sub>C carbides, while the morphology and quantity of large sized block <i>M</i><sub>6</sub>C phase in eutectic have no obvious change. The solid solution treatment causes that the element W is segregated in the dendrites to diffuse into inter-dendrites, and elements of Hf，Nb，Ti and Cr diffuse into the dendrites, the segregation degree of each element of the alloy is greatly reduced. The results of microstructure research indicate that the optimal solid-solution heat treatment process for the alloy is 1220 ℃ × 4 h.http://jam.biam.ac.cn/CN/Y2019/V39/I3/62K416B Ni-based superalloysolution temperaturemicrostructure |
| spellingShingle | HOU Guichen SU Haijun XIE Jun XUN Shuling YU Jinjiang SUN Xiaofeng ZHOU Yizhou Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content Journal of Aeronautical Materials K416B Ni-based superalloy solution temperature microstructure |
| title | Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content |
| title_full | Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content |
| title_fullStr | Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content |
| title_full_unstemmed | Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content |
| title_short | Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content |
| title_sort | effect of solid solution temperature on microstructure of hf containing k416b ni based superalloy with high w content |
| topic | K416B Ni-based superalloy solution temperature microstructure |
| url | http://jam.biam.ac.cn/CN/Y2019/V39/I3/62 |
| work_keys_str_mv | AT houguichen effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT suhaijun effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT xiejun effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT xunshuling effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT yujinjiang effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT sunxiaofeng effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent AT zhouyizhou effectofsolidsolutiontemperatureonmicrostructureofhfcontainingk416bnibasedsuperalloywithhighwcontent |