Metallurgy

Hot cracking phenomena in welds II by Thomas Böllinghaus; et al

By Thomas Böllinghaus; et al

Show description

Read or Download Hot cracking phenomena in welds II PDF

Best metallurgy books

Ultra-fine grained steels

Ultra-Fine Grained Steels discusses result of the recent new release Iron and metal fabrics study undertaking funded during the last ten years. smooth sustainability specifications wish that iron and metal needs to meet 4 stipulations: more suitable, longer carrier existence, modern production know-how (low expense, fabric and effort efficient), and environmentally sound (waste recycling, decreased carbon dioxide emission).

Welding Metallurgy and Weldability of Stainless Steels

Welding Metallurgy and Weldability of Stainless Steels, the 1st publication in over 20 years to handle welding metallurgy and weldability concerns linked to chrome steel, bargains the main updated and accomplished therapy of those subject matters at present on hand. The authors emphasize primary metallurgical rules governing microstructure evolution and estate improvement of stainless steels, together with martensistic, ferric, austenitic, duplex, and precipitation hardening grades.

Extra info for Hot cracking phenomena in welds II

Example text

Nevertheless, this one remains almost unchanged when increasing the amount of 4047. 1 0 490 510 530 550 570 590 610 630 650 Fig. 6. Solidification paths of AA2098 alloy plus AA4047 filler 30000 HCS (Integral A) 25000 20000 15000 10000 5000 0 2098 2098 + 4047 15% 2098 + 4047 25% 2098 + 4047 33% Filler content Fig. 7. e. in a given thermal gradient and with a given solidification speed. The hot cracking susceptibility, HCS, is therefore defined as the inverse of the maximum strain rate sustainable by the mushy alloy.

Weld Solidification Cracking TL 41 TS BTR B Strain A εmin dε/dT C (a) (c) Temperature (b) (d) Fig. 1. Ductility curve comparison showing (a) general schematic, (b) aluminum alloys [4], (c) plain carbon steel alloys [5], and (d) austenitic stainless steel alloys [5] Developers of the ductility curve concept believed that strain accumulation is an important factor in determining whether cracks will form. It was argued that strain accumulates from the beginning of solidification and, if accumulated in sufficiently high amounts during solidification (as represented by line A in Fig.

E. removed from the torch path and possible exposure to heat). This allows measurement of strain as the welding torch passes between the affixed pins. e. plane strain) to provide any useful information. An example of one such measurement for an autogenous Al 6060 weld is given in Fig. 5 mm gage) has been placed at the mid-span of a 100 mm long joint and the torch passes over the extensometer at approximately 15 s. 5%/s in mushy zone). (a) (b) Fig. 5. 5 mm gage) made on 4 mm aluminum 6060-T6 plate, (b) first derivative of strain-time curve in (a) showing transverse strain rate Extensometer measurements are limited to a fixed location and gage length.

Download PDF sample

Rated 4.50 of 5 – based on 42 votes