{"title":"激光定向能沉积制备的 HA188/SS316L 功能分级材料的异质微观结构和拉伸性能","authors":"","doi":"10.1016/j.optlastec.2024.111770","DOIUrl":null,"url":null,"abstract":"<div><p>Laves/NbC phase formation due to Nb element segregation is detrimental to the mechanical properties of gradient materials fabricated using stainless steel and nickel-based superalloys. Here, a novel gradient design approach was employed by selecting Nb-free HA188 and SS316L as base materials, enabling uniform transition in element distribution and phase composition. The HA188/SS316L functionally graded material exhibited a heterogenous grain structure, which was also confirmed through the grain boundary distribution map and kernel average misorientation map. The deformation twins have been observed to significantly impede dislocation motion in the fracture region. Notably, the developed gradient material exhibited a yield strength of 392 MPa, an ultimate tensile strength of 608 MPa, and an elongation of 45.2 %, surpassing conventional gradient materials derived from nickel-based superalloys and stainless steels. This research provides valuable insights into the design of heterogeneous gradient materials, offering new perspectives for enhanced performance.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Heterogeneous microstructure and tensile properties of HA188/SS316L functionally graded materials prepared by laser directed energy deposition\",\"authors\":\"\",\"doi\":\"10.1016/j.optlastec.2024.111770\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Laves/NbC phase formation due to Nb element segregation is detrimental to the mechanical properties of gradient materials fabricated using stainless steel and nickel-based superalloys. Here, a novel gradient design approach was employed by selecting Nb-free HA188 and SS316L as base materials, enabling uniform transition in element distribution and phase composition. The HA188/SS316L functionally graded material exhibited a heterogenous grain structure, which was also confirmed through the grain boundary distribution map and kernel average misorientation map. The deformation twins have been observed to significantly impede dislocation motion in the fracture region. Notably, the developed gradient material exhibited a yield strength of 392 MPa, an ultimate tensile strength of 608 MPa, and an elongation of 45.2 %, surpassing conventional gradient materials derived from nickel-based superalloys and stainless steels. This research provides valuable insights into the design of heterogeneous gradient materials, offering new perspectives for enhanced performance.</p></div>\",\"PeriodicalId\":19511,\"journal\":{\"name\":\"Optics and Laser Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optics and Laser Technology\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0030399224012283\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030399224012283","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
Heterogeneous microstructure and tensile properties of HA188/SS316L functionally graded materials prepared by laser directed energy deposition
Laves/NbC phase formation due to Nb element segregation is detrimental to the mechanical properties of gradient materials fabricated using stainless steel and nickel-based superalloys. Here, a novel gradient design approach was employed by selecting Nb-free HA188 and SS316L as base materials, enabling uniform transition in element distribution and phase composition. The HA188/SS316L functionally graded material exhibited a heterogenous grain structure, which was also confirmed through the grain boundary distribution map and kernel average misorientation map. The deformation twins have been observed to significantly impede dislocation motion in the fracture region. Notably, the developed gradient material exhibited a yield strength of 392 MPa, an ultimate tensile strength of 608 MPa, and an elongation of 45.2 %, surpassing conventional gradient materials derived from nickel-based superalloys and stainless steels. This research provides valuable insights into the design of heterogeneous gradient materials, offering new perspectives for enhanced performance.
期刊介绍:
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems