Bibliographic Details
| Title: |
Laser shock forging—a novel in situ method designed towards controlling residual stresses in laser metal deposition. |
| Authors: |
Zhang, Yongkang1 (AUTHOR), Cai, Shupeng1 (AUTHOR) caishupeng1991@sina.com, Yang, Zhifan1 (AUTHOR), Qiu, Ming2 (AUTHOR), Wang, Zhengang2 (AUTHOR), Wu, Pingping3 (AUTHOR), Xue, Chi4 (AUTHOR), Huo, Xiaojian5 (AUTHOR) |
| Superior Title: |
International Journal of Advanced Manufacturing Technology. Mar2023, Vol. 125 Issue 5/6, p2289-2304. 16p. |
| Subject Terms: |
*RESIDUAL stresses, *LASER deposition, *FATIGUE life, *STRESS concentration, *PEENING, *LASER beams, *LASER peening |
| Abstract: |
This paper presents a novel hybrid in situ additive manufacturing (AM) method–laser shock forging (LSF), which combines laser shock peening (LSP) with laser melting deposition (LMD). Based on the classical bar-frame model and inherent strain theory, the mechanisms of the effects of pretreatment and posttreatment on AM process have been elaborated for the first time. Towards controlling tensile residual stress (TRS) in the as-built (AB) state of AM parts which has a detrimental effect on their fatigue life, we then developed LSF to introduce tensile inherent strains in LMD built parts in an in situ manner, which will convert TRS to compressive residual stress (CRS). The laser beam used for shock peening can be adjusted to move synchronously with the laser beam used for metal deposition and keep a certain distance, ensuring the laser shock peening to act on the region where the material temperature cools down to the forging temperature range. Then, experimental works have been conducted on 316L stainless steel; residual stress distributions of the AB, LSP, and LSF treated specimens were compared; results show that LSF increases both the magnitude and depth of CRS compared with conventional LSP treatment, thus providing a promising application in enhancing fatigue life in AM process. [ABSTRACT FROM AUTHOR] |
|
Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Premier |
|
Full text is not displayed to guests. |
Login for full access.
|