ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. In the welded joints studied according to the results of short-term static tests the basic metal and the heat-affected zone have higher strength and lower ductility than weld metal. 2. A crack in the metal of the heat-affected zone in the test welded joints always deviated from the plane of its development solely in the direction of the basic metal. 3. An increase in loading frequency from 0.5 to 25 Hz leads to a reduction in FCG rate in the basic metal and in weld metal by factors of two and ten respectively. With a loading frequency of 0.5 Hz the FCG rate in basic metal and weld metal is the same. With a loading frequency of 25 Hz the FCG rate in the basic metal in the medium-amplitude section of the FCG diagram is higher by a factor of ten compared with the FCG rate in weld metal, and the threshold value Kth is lower by a factor of 2.5 than in weld metal. 4. Characteristics of static, cyclic, and dynamic fracture toughness for the basic metal and metal of the heat-affected zone differ insignificantly. For weld metal cyclic and dynamic fracture toughness characteristics are almost the same, but compared with the value of fracture toughness with static loading they are lower by a factor of 1.5.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01529744
Permalink