Optical micrographs showing -martensite phase etched dark in AISI 304L stainless steel at 0 C to cold rolling reduction of (a) 0%, (b) 20%, (c) 30%, (d) 50%, (e) 70%, and (f) 90%. The hardness was determined using Vickers hardness test with is transformed to -martensite during cold rolling. ANALYSIS OF DISSIMILAR METAL BY TIG WELDING OF project weld hardness and the microstructure have been analyzed for dissimilar metal welding of 301 stainless steel to 1020 mild steel taking 302 stainless steel as the filler metal. Similarly taking strain developed as an index the susceptibility of the welded joint
Submerged arc welding (SAW) has been well utilised for the production of weld joints in 304 L ASS for various industrial application. However, effective performance of the material in service has been hampered by improper choice of electrode. Therefore, in this study, effects of different types of electrode on the microstructure and tensile property of type 304 L austenitic stainless steel GUIDE TO ETCHING SPECIALTY ALLOYSmicrostructure of a sample of Type 330 stainless steel in the annealed condition at 100X magnification. It was etched using a tint etch consisting of a solution of 40 ml hydrochloric acid (HCL) + distilled water (H 2O) + one gram potassium meta bisulfite (K 2S 2O 5) + four grams ammonium bifluoride (NH 4FHF) at room temperature. Martensitic Transformation in Austenitic Stainless Steelsstainless steels) and E. Maurer and B. Strauss in Germany (austenitic stainless steels) urged the commercial applicability of stainless steels between 1910 and 1915. The development of precipitation-hardenable stainless steels in 1940s was by led United States Steel Co. as a consequence of further research on the role of
etched using a mixed solution of distilled water, hydrochloric acid and nitric acid with a ratio of 4:3:3. The microstructures of transformed phase were then observed using a scanning electron microscopy (SEM) (JEOL, Tokyo, Japan). Table 1. Chemical composition of austenitic 301 stainless steels measured by ICP-OES. Alloys C Cr Ni Mn Al Cu N Mechanical Properties and Microstructures on Dissimilar Dec 04, 2018 · It shows that the nugget of SS301 and AA1100 weld by micro-RSW is brittle. SS301 is low-carbon steel, and Fe composition leads to brittle weld in the nugget when a joint of SS301AA1100 melts and then cool down to room temperature. Cooling process affects microstructure composition. Metallography and Microstructures of Stainless Steels stainless steel disks for macroetching are iden-tical to those used for carbon, alloy, and tool steels. Because these grades are more difcult to etch, however, all surfaces to be etched must be smooth ground or polished. Saw-cut surfaces will yield little useful information if they are ma-croetched. Macroetchants for stainless steels are
Jul 22, 2020 · The microstructure in the as-welded condition consists of martensite, 19% delta-ferrite, retained austenite and carbide precipitates. The hardness value of the top layer in the as-welded condition is 469 ± 8 HV. The precipitates are bond to the delta PPT CARBON STEEL Microstructure PowerPoint CARBON STEEL Microstructure & Mechanical properties EXPERIMENT # 10 Instructor:M.Yaqub TYPE OF IRON a-Iron (Ferrite) Stable up to 912 oC. BCC in Structure. A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow - id:5627a2-NDViZ Stainless Steels - University of Cambridge(a) Duplex stainless steel, IC378, hot rolled in the direction indicated. The darker etching phase is ferrite and the remainder is austenite (b) Duplex stainless steel IC381 (dark phase is ferrite). (c) Duplex stainless steel IC381 (dark phase is ferrite). (d) Superduplex stainless steel A219 after heat treatment at 1150°C for 2.5 h.
Marshalls etch. 200 Top, right:Annealing twins in AISI 347H austenitic stainless steel photographed using differential interference contrast (Nomarski). Electrolytically etched in 60% nitric acid in water. 5 volts, stainless steel cathode. 500 stainless steel. microstructure, texture, thin strip Here, the microstructure of a duplex stainless steel slab 1.4362 produced by continuous casting has been investigated by optical microscopy, scanning electron microscopy, EBSD and EDS. The slab showed different macrostructures through the thickness. The macrostructure can be divided into 3 types:fine equiaxed, columnar and coarse equiaxed grains.Characterization of Grain Size and Yield Strength in AISI The material used was a hot rolled AISI 301 stainless steelsheet with 5 mm thickness. The chemical composition of thestarting material is given in Table1. The polished and un-etched surfaces of the