| 高强度钢54SCV6超高周疲劳研究 |
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| 引用本文： | 李治彬.高强度钢54SCV6超高周疲劳研究[J].哈尔滨工业大学学报,2000,32(1):82-85. |
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| 作者姓名： | 李治彬 |
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| 作者单位： | 哈尔滨工程大学,船舶与海洋工程系,黑龙江,哈尔滨,150001 |
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| 摘 要： | 介绍用２０ＫＨｚ超声波振动疲劳试验机对一组高强度钢５４２ＳＣＶ６的２９个试件的超高周疲劳强度研究结果，研究发现，中材料的高周直到超高周区间疲劳强度随材料寿命的加大呈明显减小，即Ｓ－Ｎ曲线呈明显下降。这一结果与传统的假说认为该区间的疲劳强度为水平渐近线或为一定值完全不同。
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| 关 键 词： | 超声波振动 超高周疲劳 高强度钢 54SCV6 试验 |
| 文章编号： | 0367-6234(2000)01-0082-04 |
| 修稿时间： | 1999-11-18 |
Gigacycle fatigue of high strength steel 54scv6 |
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| LI Zhi-bin.Gigacycle fatigue of high strength steel 54scv6[J].Journal of Harbin Institute of Technology,2000,32(1):82-85. |
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| Authors: | LI Zhi-bin |
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| Affiliation: | LI Zhi-bin
;(Dept. Of Naval Architecture & Ocean Engineering, Harbin Engineering University, Harbin 150001, China) |
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| Abstract: | An attempt has been made to characterize gigacycle (1010 cycles) fatigue behavior of high strength spring steel (54scv6) wire by means of an ultrasonic frequency of 20 KHz fatigue test and analytical techniques. The fatigue strength of the steel wires in Gigucycle cycles was determined at a load milo R = - 1. The experimental results
show that fatigue mptore can occur and the fatigue endurance stress continues to deorease with increasing number of
cycles between 106 and 1010 cycles. This result is much different from conventional hypothesis. The different between
conventional hypothesis and test result is showed. Observations of fracture section were made by using Scanning
Electron Microscopy (SEM) and chemical analysis were made by special instrument. The fatigue rapture mechanism
of gigacyele of high strength steel is discussed. |
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| Keywords: | ultrasonic vibration gigacyele fatigue high strength steel |
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