Fatigue behaviour of helical compression springs at a very high number of cycles - Investigation of various influences
Fatigue behaviour of helical compression springs at a very high number of cycles - Investigation of various influences
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DOI：
10.1016/j.ijfatigue.2013.01.003
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发表时间：
2014-03-01
影响因子：
6
通讯作者：
Mahendran, M.
中科院分区：
文献类型：
--
作者：
Pyttel, B.;Brunner, I.;Mahendran, M.
利用专用的弹簧疲劳试验机对喷丸螺旋压缩弹簧进行了40 Hz的长期疲劳试验。测试弹簧由三种不同的弹簧材料制成-油硬化和回火SiCr和sicrv合金阀门弹簧钢和不锈钢。通过一种特殊的测试策略，在不同的应力水平下，同时测试了500个线径d = 3.0 mm的弹簧或900个线径d = 1.6 mm的弹簧。基于对d = 3.0 mm的弹簧在N = 10(9)循环次数下的疲劳研究，在继续进行N = 1.5 x 10(9)的测试后进行了分析，并对其结果进行了比较。研究了不同喷丸条件对d = 1.6 mm弹簧的影响。采用光学显微镜、扫描电镜和金相显微切片对断裂试验弹簧进行了观察，分析了断裂行为和失效机理。本文对不同弹簧尺寸、材料、循环次数和喷丸强化条件的结果进行了比较，并概述了在vhcf地区的进一步研究。(C) 2013 Elsevier Ltd.版权所有。
Long-term fatigue tests on shot peened helical compression springs were conducted by means of a special spring fatigue testing machine at 40 Hz. Test springs were made of three different spring materials - oil hardened and tempered SiCr- and SiCrV-alloyed valve spring steel and stainless steel. With a special test strategy in a test run, up to 500 springs with a wire diameter of d = 3.0 mm or 900 springs with d = 1.6 mm were tested simultaneously at different stress levels. Based on fatigue investigations of springs with d = 3.0 mm up to a number of cycles N = 10(9) an analysis was done after the test was continued to N = 1.5 x 10(9) and their results were compared. The influence of different shot peening conditions were investigated in springs with d = 1.6 mm. Fractured test springs were examined under optical microscope, scanning electron microscope (SEM) and by means of metallographic microsections in order to analyse the fracture behaviour and the failure mechanisms. The paper includes a comparison of the results of the different spring sizes, materials, number of cycles and shot peening conditions and outlines further investigations in the VHCF-region. (C) 2013 Elsevier Ltd. All rights reserved.