Cyclic life of additive 316LSI stainless steel under stress concentration conditions
Year: 2024
Type: article
Abstract: The paper presents an experimental study of the cyclic durability of 316LSi stainless steel obtained using additive manufacturing technology using wire-arc welding. When welding a 316LSi plate, a promising cold metal transfer method was used. It allows minimizing the heating of the products during welding. After that, the plate was subjected to a heat treatment process to relieve residual stresses. Samples were cut from the welded plate in three different directions relative to the plane of the welded layers for low-cycle fatigue testing under tension-compression. Cylindrical samples with annular groove were made to study the effect of stress concentration on the fatigue resistance characteristics. Experimental studies were conducted at the Center of Experimental Mechanics of Perm National Research Polytechnic University. The servohydraulic testing machine MTS Landmark 370.10 was used to conduct cyclic tests. Based on the test results, the dependences of cyclic durability on the amplitude of applied stresses were constructed. The highest fatigue resistance characteristics are possessed by samples cut at an angle of 45 degrees to the surfacing plane was shown. For two of the three orientations of the samples, a comparison was made with the results of cyclic tests on samples without a concentrator by other authors. Based on the results of the comparison, effective stress concentration factors were determined. An assessment was made of the anisotropy of cyclic and static mechanical characteristics.
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4407968340