Thermal stability of additively manufactured austenitic 304L ODS alloy

作     者：Milad Ghayoor Saereh Mirzababaei Anumat Sittiho Indrajit Charit Brian K.Paul Somayeh Pasebani Milad Ghayoor;Saereh Mirzababaei;Anumat Sittiho;Indrajit Charit;Brian K.Paul;Somayeh Pasebani

作者机构：School of MechanicalIndustrial and Manufacturing EngineeringOregon State UniversityCorvallisOR97330United States Advanced Technology and Manufacturing Institute(ATAMI)CorvallisOR97330United States Materials Science and EngineeringUniversity of IdahoMoscowID83844United States 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第83卷第24期

页      面：208-218页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the funding of critical equipment provided by the Murdock Charitable Trust(No.2016231:MNL:5/18/2017) the RAPID Institute,the U.S.DOE(No.DE-EE0007888) the NSF Advanced Manufacturing Program(No.1856412)for the financial support 

主　　题：Laser powder bed fusion(LPBF) Oxide dispersion strengthened(ODS)alloy High-temperature Aging Thermal stability 

摘      要：Thermal stability and high-temperature mechanical properties of a 304 L austenitic oxide dispersion strengthened(ODS)alloy manufactured via laser powder bed fusion(LPBF)are examined in this *** manufactured 304 L ODS alloy samples were aged at temperatures of 1000,1100,and 1200℃for 100 h in an argon *** characterization of LPBF 304 L ODS alloy before and after the thermal stability experiments revealed that despite the annihilation of dislocations,induced cellular substructure by the LPBF process was partially retained in the ODS alloy even after aging at1200℃.The size of Y-Si-O nanoparticles after aging at 1200℃increased from 25 to 50 *** analysis revealed that nanoparticles retained the microstructure of LPBF 304 L ODS and hindered recrystallization and further grain *** 600℃and 800℃,the yield stress of the 290 and 145 MPa were measured,respectively,which are substantially higher than 113 MPa,and 68 MPa for 304 L at the same ***,the creep properties of LPBF 304 L ODS alloy were evaluated at a temperature of 700℃under three applied stresses of 70,85,and 100 MPa yielding a stress exponent(n)of 7.7;the minimum creep rate at 100 MPa was found to be about two orders of magnitude lower than found in the literature for wrought 304 L stainless steel.