Karl Bailey , Sumair Sunny , Ritin Mathews , Arif Malik
{"title":"用耦合元胞自动机有限元模型预测激光冲击强化过程中动态再结晶的影响","authors":"Karl Bailey , Sumair Sunny , Ritin Mathews , Arif Malik","doi":"10.1016/j.mfglet.2025.06.044","DOIUrl":null,"url":null,"abstract":"<div><div>A coupled cellular automata-finite element (CAFE) model has been developed to simulate the phenomenon of dynamic recrystallization (DRX) during the laser shock peening (LSP) process on the titanium alloy, Ti6Al4V. Although microstructure changes resulting from DRX during LSP treatment have been observed and studied experimentally, there is no work to-date on a model that is capable of simulating LSP while also capturing the potential effects of microstructure evolution due to DRX. Creating an LSP model that couples DRX during the high intensity shock wave propagation is a major challenge considering the very high-strain rates and nanosecond-scale time duration, as well as the requirement to repeatedly update the grain boundary locations and the localized mechanical properties of grains during the simulation. This paper introduces the first modeling framework for simulating microstructural evolution due to DRX during the LSP treatment process. The framework includes predictions of both continuous DRX (cDRX) and discontinuous DRX (dDRX), as well as the influence of the predicted microstructure evolution on the resulting stress–strain fields arising from LSP treatment. For an experimentally determined initial microstructure and specific LSP process parameters, the final state of residual stress predicted by this CAFE model shows substantially increased local variation in the compressive stress field as compared to the case when DRX is not considered. This variation is particularly evident in the vicinity of the part surface where most of the DRX is observed and predicted to occur. In addition, based on the process conditions for the specific LSP treatment considered, cDRX is predicted to be the dominant mechanism of microstructural evolution. This is because the overall temperature increase that occurs during LSP, arising due to plastic deformation alone when an ablative surface coating is included, is found to be insufficient to induce dDRX-based nucleation in the Ti6Al4V alloy.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"44 ","pages":"Pages 364-375"},"PeriodicalIF":2.0000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Impact of dynamic recrystallization in laser shock peening predicted via a coupled cellular automata finite element model\",\"authors\":\"Karl Bailey , Sumair Sunny , Ritin Mathews , Arif Malik\",\"doi\":\"10.1016/j.mfglet.2025.06.044\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A coupled cellular automata-finite element (CAFE) model has been developed to simulate the phenomenon of dynamic recrystallization (DRX) during the laser shock peening (LSP) process on the titanium alloy, Ti6Al4V. Although microstructure changes resulting from DRX during LSP treatment have been observed and studied experimentally, there is no work to-date on a model that is capable of simulating LSP while also capturing the potential effects of microstructure evolution due to DRX. Creating an LSP model that couples DRX during the high intensity shock wave propagation is a major challenge considering the very high-strain rates and nanosecond-scale time duration, as well as the requirement to repeatedly update the grain boundary locations and the localized mechanical properties of grains during the simulation. This paper introduces the first modeling framework for simulating microstructural evolution due to DRX during the LSP treatment process. The framework includes predictions of both continuous DRX (cDRX) and discontinuous DRX (dDRX), as well as the influence of the predicted microstructure evolution on the resulting stress–strain fields arising from LSP treatment. For an experimentally determined initial microstructure and specific LSP process parameters, the final state of residual stress predicted by this CAFE model shows substantially increased local variation in the compressive stress field as compared to the case when DRX is not considered. This variation is particularly evident in the vicinity of the part surface where most of the DRX is observed and predicted to occur. In addition, based on the process conditions for the specific LSP treatment considered, cDRX is predicted to be the dominant mechanism of microstructural evolution. This is because the overall temperature increase that occurs during LSP, arising due to plastic deformation alone when an ablative surface coating is included, is found to be insufficient to induce dDRX-based nucleation in the Ti6Al4V alloy.</div></div>\",\"PeriodicalId\":38186,\"journal\":{\"name\":\"Manufacturing Letters\",\"volume\":\"44 \",\"pages\":\"Pages 364-375\"},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Manufacturing Letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213846325000768\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, MANUFACTURING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Manufacturing Letters","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213846325000768","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MANUFACTURING","Score":null,"Total":0}
Impact of dynamic recrystallization in laser shock peening predicted via a coupled cellular automata finite element model
A coupled cellular automata-finite element (CAFE) model has been developed to simulate the phenomenon of dynamic recrystallization (DRX) during the laser shock peening (LSP) process on the titanium alloy, Ti6Al4V. Although microstructure changes resulting from DRX during LSP treatment have been observed and studied experimentally, there is no work to-date on a model that is capable of simulating LSP while also capturing the potential effects of microstructure evolution due to DRX. Creating an LSP model that couples DRX during the high intensity shock wave propagation is a major challenge considering the very high-strain rates and nanosecond-scale time duration, as well as the requirement to repeatedly update the grain boundary locations and the localized mechanical properties of grains during the simulation. This paper introduces the first modeling framework for simulating microstructural evolution due to DRX during the LSP treatment process. The framework includes predictions of both continuous DRX (cDRX) and discontinuous DRX (dDRX), as well as the influence of the predicted microstructure evolution on the resulting stress–strain fields arising from LSP treatment. For an experimentally determined initial microstructure and specific LSP process parameters, the final state of residual stress predicted by this CAFE model shows substantially increased local variation in the compressive stress field as compared to the case when DRX is not considered. This variation is particularly evident in the vicinity of the part surface where most of the DRX is observed and predicted to occur. In addition, based on the process conditions for the specific LSP treatment considered, cDRX is predicted to be the dominant mechanism of microstructural evolution. This is because the overall temperature increase that occurs during LSP, arising due to plastic deformation alone when an ablative surface coating is included, is found to be insufficient to induce dDRX-based nucleation in the Ti6Al4V alloy.