Cyclic strength of joints from SS 321 obtained by laser-arc hybrid welding

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019 Pub Date : 2019-11-19 DOI:10.1063/1.5131997

A. Gusarova, A. V. Chumaevski, A. N. Ivanov, L. Zhukov, V. Beloborodov

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Abstract

Deformation and fracture regularities of samples from stainless steel 321 during fatigue testing are investigated. It is revealed that during the cyclic tensile tests according to the scheme “loading-unloading” the samples demonstrate high cycle life in the range of maximum stresses in the cycle from 0.65 UTS to 0.70 UTS. At the stresses of 0.75-0.80 UTS the samples are characterized by lower level of cycle life. It is revealed, that the specimen fracture is localized in the weld seam area. At different values of maximum stress, it is possible both to fracture with a neck formation, and purely fatigue rupture.Deformation and fracture regularities of samples from stainless steel 321 during fatigue testing are investigated. It is revealed that during the cyclic tensile tests according to the scheme “loading-unloading” the samples demonstrate high cycle life in the range of maximum stresses in the cycle from 0.65 UTS to 0.70 UTS. At the stresses of 0.75-0.80 UTS the samples are characterized by lower level of cycle life. It is revealed, that the specimen fracture is localized in the weld seam area. At different values of maximum stress, it is possible both to fracture with a neck formation, and purely fatigue rupture.

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激光-电弧复合焊接ss321接头的循环强度

研究了321不锈钢试样在疲劳试验中的变形和断裂规律。结果表明，在加载-卸载方案下的循环拉伸试验中，试样在0.65 ~ 0.70 UTS的最大应力范围内具有较高的循环寿命。在0.75-0.80 UTS的应力下，样品的循环寿命较低。结果表明，试样断裂集中在焊缝区域。在不同的最大应力值下，既可能发生颈状断裂，也可能发生纯粹的疲劳断裂。研究了321不锈钢试样在疲劳试验中的变形和断裂规律。结果表明，在加载-卸载方案下的循环拉伸试验中，试样在0.65 ~ 0.70 UTS的最大应力范围内具有较高的循环寿命。在0.75-0.80 UTS的应力下，样品的循环寿命较低。结果表明，试样断裂集中在焊缝区域。在不同的最大应力值下，既可能发生颈状断裂，也可能发生纯粹的疲劳断裂。

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PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019

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