Studies on metallurgical and impact toughness behavior of variably sensitized weld metal and heat affected zone of AISI 304L welds

Selective Dissolution of Delta Ferrite Phase in Welded 308 Stainless Steel under Proton Irradiation

“…In the ferritic-austenitic solidi cation mode (FA mode) for austenitic stainless weld metals, two types of ferritic morphology have been reported; one is known as a vermicular ferrite, and the other is a lathy ferrite 19) . Since the KS orientation relationship is established at the γ phase grain boundary for the lathy ferrite phase, the lathy ferrite shows a lower degree of sensitization, leading to a higher resistance to corrosion 19,20) . However, in the present study, because the δ phases examined did not meet the KS orientation relationship between γ and δ phases (see Fig.…”

“…6), almost all δ phases would be the vermicular ferrite phases. The proportion of lathy ferrite to vermicular ferrite in weld metal solidi ed in FA mode is reported to be strongly dependent on the crystallographic orientation relationship between the primary γ and δ phases during solidi cation as well as on the welding heat ow rate and direction against the preferential growth direction of γ and δ phases 19,20) . More extensive efforts to accumulate data on EBSD measurements for the dendritic structures including both vermicular and lathy ferrite phases are necessary to improve the understanding of selective dissolution of δ phase in the weld metal under irradiation.…”

Investigation on the Formation of Cr-Rich Precipitates at the Interphase Boundary in Type 430 Stainless Steel Based on Austenite–Ferrite Transformation Kinetics

“…Hilders et al [14] also related the decrease in toughness of 304L stainless steel to the increasing volume fraction of voids nucleated at the grain boundary precipitates formed during sensitization. Kumar Subodh and Shahi [15] revealed the detachment at heavily precipitated grain boundaries in the heat-affected zone of AISI 304L welds after post-weld thermal aging.…”

Pengaruh Kuat Arus Listrik Dan Jenis Kampuh Las Terhadap Kekerasan Dan Strukturmakro Pada Pengelasan Stainless Steel Aisi 304

“…Pengelasan adalah teknologi fabrikasi yang sering digunakan pada berbagai aplikasi industri, bermacam-macam isu dan perhatian selama proses pengelasan berperan penting dalam menentukan kepuasan dan kepercayaan unjuk kerja dari fabrikasi lasan [1]. Secara umum, proses fabrikasi melibatkan proses pengelasan seperti Shielded Metal Arc Welding (SMAW) [2].…”

“…Perbedaan daerah lasan berpengaruh terhadap struktur mikro yang terjadi pada daerah lasan tersebut [1]. Kedalaman penetrasi dan lebar dari HAZ berperan penting terhadap penentuan sifat mekanik dan kualitas hasil lasan [6].…”