Effect of Ti+Al Content on the Microstructure and Properties of Laser Additive Specimens of IN718 Alloy AITranslate
Abstract AITranslate
To improve the mechanical properties and service temperature of laser additive IN718 alloy components,five improved IN718 laser additive samples with the gradient increase in Ti+Al content were prepared.The mechanical properties at room temperature and high temperature and microstructure of the samples were studied by universal testing machine,SEM,XRD,and JMatpro software.The results indicate that as the Ti+Al content increases,the proportiaon ofγ′phase gradually rises,with an increase in room temperature strength and a significant decrease in elongation.When the content of Ti+Al reaches 7.6%,the proportion ofγ′precipitated phase is 5 times that ofγphase and the hardness is 55.6 HRC.Then the abundant precipitation of brittle phases results in the initiation of cracks.After undergoing 1100℃×1 h+850℃×8 h heat treatment,the high-temperature strength of the samples at 850℃initially increases and then decreases with the increasing Ti+Al content.And when the content of Ti+Al arrives at 5.6%,the high-temperature yield strength and elongation of the samples reach the maximum value of 553 MPa and 12%,respectively,showing consistency in all directions.Meanwhile,the proportions ofγ′precipitated phase andγphase are close(41.5%and 39.9%,respectively).In subsequent research,the Ti+Al content in standard IN718 alloy can be increased to 5.6%,and properly usingγ′strengthening can obtain excellent high-temperature mechanical properties and compatibility of laser additive process.
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DOI：
Chinese Library Classification Number:TH142.2[一般工业技术—材料科学与工程]
Citation Information:
To improve the mechanical properties and service temperature of laser additive IN718 alloy components,five improved IN718 laser additive samples with the gradient increase in Ti+Al content were prepared.The mechanical properties at room temperature and high temperature and microstructure of the samples were studied by universal testing machine,SEM,XRD,and JMatpro software.The results indicate that as the Ti+Al content increases,the proportiaon ofγ′phase gradually rises,with an increase in room temperature strength and a significant decrease in elongation.When the content of Ti+Al reaches 7.6%,the proportion ofγ′precipitated phase is 5 times that ofγphase and the hardness is 55.6 HRC.Then the abundant precipitation of brittle phases results in the initiation of cracks.After undergoing 1100℃×1 h+850℃×8 h heat treatment,the high-temperature strength of the samples at 850℃initially increases and then decreases with the increasing Ti+Al content.And when the content of Ti+Al arrives at 5.6%,the high-temperature yield strength and elongation of the samples reach the maximum value of 553 MPa and 12%,respectively,showing consistency in all directions.Meanwhile,the proportions ofγ′precipitated phase andγphase are close(41.5%and 39.9%,respectively).In subsequent research,the Ti+Al content in standard IN718 alloy can be increased to 5.6%,and properly usingγ′strengthening can obtain excellent high-temperature mechanical properties and compatibility of laser additive process.
quote
| GB/T 7714-2015 | [1] LEI Yuan-tao, WU Wen-xing, YANG Tong, et al. Effect of Ti+Al Content on the Microstructure and Properties of Laser Additive Specimens of IN718 Alloy[J]. Rare Metals and Cemented Carbides, 2024(2): 55-62. |
| MLA | [1] LEI Yuan-tao, et al., "Effect of Ti+Al Content on the Microstructure and Properties of Laser Additive Specimens of IN718 Alloy." Rare Metals and Cemented Carbides, no. 2, 2024, pp. 55-62. |
| APA | [1] LEI Yuan-tao, WU Wen-xing, YANG Tong, SHEN Long-zhang, CHEN Yong, ZHU Hong-mei, & QIU Chang-jun. (2024). Effect of Ti+Al Content on the Microstructure and Properties of Laser Additive Specimens of IN718 Alloy. Rare Metals and Cemented Carbides(2), 55-62. |
| IEEE | [1] LEI Yuan-tao, WU Wen-xing, YANG Tong, SHEN Long-zhang, CHEN Yong, ZHU Hong-mei, and QIU Chang-jun, "Effect of Ti+Al Content on the Microstructure and Properties of Laser Additive Specimens of IN718 Alloy," Rare Metals and Cemented Carbides, no. 2, pp. 55-62, 2024. keywords: {laser additive manufacturing;IN718 alloy;Ti+Al content;mechanical property;precipitated phase} |