This paper presents the experimental work on the sensitivity enhancement of porous aluminium oxide based capacitive humidity sensor for trace moisture measurement. The ERNiMo-8 weldment showed relatively better comprehensive performance when the cryogenic toughness was considered. The cryogenic tensile properties of both weldments were rather higher than requirements in the relevant standards. ![]() The corresponding cryogenic tensile strength of the two weldments was 1070 MPa and 960 MPa, respectively. The cryogenic impact energy of the ER308L weldment was 51 J, lower than the value (84 J) of the ERNiMo-8 weldment. The Charpy impact and tensile test at room (25 ☌) and low temperature (− 196 ☌) was implemented. For both joints, not only the microstructure gradient, but also the element gradient was observed near interfaces between weld metals and base metals. Investigation on the microstructure showed that there were dual phases (martensite and austenite) in the ER308L weld, but only austenite in the ERNiMo-8 weld. ![]() After welding parameters were optimized, qualified weld formations were made. The dissimilar joints between SA553 and SUS304 were produced by CO 2 laser welding with the ERNiMo-8 and ER308L filler wire.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |