Abstract
We formulate the requirements that should be met by thin-walled pressure vessels used in nickel-hydrogen storage cells and present data of optimization of various types of welding for the KhN78T nickel alloy used in these vessels. We give a critical analysis of the engineering methods for computing strength and durability of thin-walled pressure vessels and propose an algorithm for decreasing the amount of metal used in manufacturing them. The results of fatigue tests of welded joints of KhN78T alloy and full-scale vessels made of 12Kh18N10T steel are discussed. We show that the existing engineering methods for calculating durability fail to describe the fatigue behavior of 0.6– 0.8 mm-thick welded joints of the KhN78T alloy. The experimental data obtained enable one to reduce the mass of the vessels used in practice by 1.5–1.6 times.
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