Search Results for weld microstructure

Fig. 29 Color etching to reveal weld microstructure. (a) Montage showing the structure of a large weld in a carbon steel as revealed using 2% nital. Note that the grain size and shape change dramatically from the fusion line (arrows) to the base metal at right. Nital did not fully reveal More

Fig. 5 19 mm (0.75 in.) A-710 steel plate, submerged arc weld. Microstructure shows dragout of base metal scale between the base metal and the epoxy filler used in the gap between the base plate and backup plate in a multiple-pass butt weld. As-polished. Magnification: 280× More

Fig. 1 The Schaeffler diagram used for predicting weld microstructure using type 309 to join type 304 stainless steel to carbon steel. See text for details. More

Fig. 6 The DeLong diagram used for predicting weld microstructure. See text for details. More

Fig. 14 Actual weld microstructures corresponding to schematics of Fig. 13 . (a) Grain structure of a GTAW of aluminum alloy 6061, made with Q of 700 W (200 Btu/h) and V of 5.1 mm/s (0.20 in./s). (b) Grain structure of a GTAW of pure aluminum, made with V of 20.8 mm/s (0.819 in./s). (c More

Fig. 33 Microstructure of weld and heat-affected zone on longitudinal weld sample No. 1. Etched in 5% nital. Original magnification: 100× More

Fig. 34 Microstructure of weld and heat-affected zone on longitudinal weld sample No. 2. Etched in 5% nital. Original magnification: 150× More

Fig. 47 Microstructure of the second weld bead of a submerged-arc weld joint in 200 mm ( 3 4 in.) duplex stainless steel plate. The extremely fine austenite precipitate was formed as a result of reheating from the subsequent weld pass, which used an arc energy of 6 kJ/mm (150 kJ More

Fig. 751 Microstructure of as-deposited weld metal discussed in Fig. 748 , 749 , and 750 , which consists of untempered martensite dendrites and a carbide eutectic in interdendritic regions. This a brittle structure that is prone to cracking during welding. See the brittle fracture regions More

Fig. 12(d) Microstructure of longitudinal weld metal near fracture-initiation point. Note the white phase along grain boundaries. More

Fig. 9 Duplex austenite-ferrite microstructure for type 308 submerged arc weld showing very high density of inclusions rich in silicon and manganese. Source: Ref 17 More

Fig. 17 Comparison between (a) the actual microstructure of a seam weld in an API X70 linepipe and (b) the microstructure of a gold-coated replica of the same area. (a) Etched in 2% nital. Original magnification 9× More

Fig. 18 Comparison between (a) the actual microstructure of a seam weld in an API X70 linepipe and (b) the microstructure representing a gold-coated replica of the same area. Different region of the weld shown in Fig. 17 . Original magnification 100× More

Fig. 55 Microstructure of a friction stir weld in 2519 aluminum (Al-5.8%Cu-0.3%Mn-0.3%Mg-0.06%Ti-0.1%V-0.15%Zr) etched with Weck's reagent and viewed with polarized light plus sensitive tint. Original at 100×. The magnification bar is 100 μm long. More

Fig. 29 (a) Microstructure of fusion weld on a Ni-Cr-Mo-Gd alloy. (b) Pseudo-binary phase diagram for the γ-gadolinium system. (c) Comparison of the measured and calculated γ/Ni 5 Gd fraction eutectic from fusion welds made on alloys with various gadolinium concentrations. Source: Ref 44 More

Fig. 5 Weld metal microstructure of HSLA steel. A, grain-boundary ferrite; B, acicular ferrite; C, bainite; D, sideplate ferrite More

Fig. 50 Microstructure of flash-butt weld showing segregation bands representing the metal flow during deformation. Hot modified Winsteard's reagent. Original magnification 50× More

Fig. 51 Microstructure of flash-butt weld showing segregation bands representing the metal flow during deformation. Hot modified Winsteard's reagent. Original magnification 50× More

Fig. 18 Weld metal microstructure. GB, grain boundary More

Fig. 35 Microstructure of heat-affected zone on longitudinal weld sample No. 2 showing nodular graphite. Etched in 5% nital. Original magnification: 80× More