针对镁合金材料早期力学性能退化问题,研究发展了一套可靠的非线性超声系数的测量实验系统,利用该系统测量了AZ31镁合金拉伸和疲劳试件的超声非线性系数.实验结果表明,在拉伸试件进入塑性应变阶段,疲劳试件在疲劳寿命的55%左右之前,超声非线性系数对镁合金材料力学性能退化具有很高的灵敏度.同时利用光学显微镜对拉伸试件的位错滑移带进行了原位微观观察,位错滑移带在塑性阶段随加载应力增大而增多.宏观力学、非线性超声检测和微观观察实验结果表明超声非线性系数作为宏观和微观的桥梁可以表征材料的早期力学性能退化情况.另外在中低周疲劳范围内,加载应力的大小以及拉-拉和拉-压疲劳模式的变化对实验结果没有明显的影响.
参考文献
| [1] | 税国双,汪越胜,Jianmin Qu,Jin-Yeon Kim,Laurence J. Jacobs.利用直接激发Rayleigh表面波的方法测量材料的声学非线性系数[J].声学学报,2008(04):378-384. |
| [2] | Cantrell JH. .Substructural organization, dislocation plasticity and harmonic generation in cyclically stressed wavy slip metals[J].Proceedings of the Royal Society. Mathematical, physical and engineering sciences,2004(2043):757-780. |
| [3] | SZILARD J.Ultrasonic testing:non-conventional testing techniques[M].John Wiley and Sons,Inc,1982 |
| [4] | Peter B. Nagy .Fatigue damage assessment by nonlinear ultrasonic materials characterization[J].Ultrasonics,1998(1/5):375-381. |
| [5] | Jordan PM .Finite-amplitude acoustic traveling waves in a fluid that saturates a porous medium: Acceleration wave formation[J].Physics Letters, A,2006(3):216-221. |
| [6] | Kyung-Young Jhang .Nonlinear Ultrasonic Techniques for Nondestructive Assessment of Micro Damage in Material: A Review[J].International Journal of Precision Engineering and Manufacturing,2009(1):123-135. |
| [7] | CANTRELL J H;YOST W T .Nonlinear ultrasonic characterization of fatigue microstructures[J].International Journal of Fatigue,2001,23:S487-S490. |
| [8] | BUCK O;ALERS G A.New techniques for detection and monitoring of fatigue damage[J].Fatigue and microstructure American Society for Metals,1979:101-147. |
| [9] | Kim JY;Jacobs LJ;Qu JM;Littles JW .Experimental characterization of fatigue damage in a nickel-base superalloy using nonlinear ultrasonic waves[J].The Journal of the Acoustical Society of America,2006(3):1266-1273. |
| [10] | Guoshuang Shui;Jin-Yeon Kim;Jianmin Qu .A new technique for measuring the acoustic nonlinearity of materials using Rayleigh waves[J].NDT & E International: Independent Nondestructive Testing and Evaluation,2008(5):326-329. |
| [11] | 徐从元,姜文华.疲劳金属材料非线性声学特性的实验研究[J].南京大学学报（自然科学版）,2000(03):328-335. |
| [12] | 税国双,汪越胜,曲建民.材料力学性能退化的超声无损检测与评价[J].力学进展,2005(01):52-68. |
| [13] | SOHN K Y;JONES J W;BERKMORTEL J.Creep and Bolt Load Retention Behavior of Die Cast Magnesium Alloys for High Temperature Application[A].Warrendale,PA,2000 |
| [14] | 胡燕辉,李建国,谭敦强,曹凑先.细晶AZ31镁合金高温压缩变形行为研究[J].航空材料学报,2010(01):36-40. |
| [15] | BREAZEALE M A;PHILIP Jacob.Determination of Third ordcr Elastic Constants from Ultrasonic Harmonic Generation Measurements[A].Academic Press,Inc,1984 |
| [16] | CANTRELL J H .Crystalline structure and symmetry dependence of acoustic nonlinearity parameters[J].Journal of Applied Physics,1994,76(06):3372-3380. |
| [17] | Hurley D C;Fortunko C M .Determination of the nonlinear ultrasonic parameter βusing a Michelson interferometer[J].Measurement Science and Technology,1997,8:634-642. |
| [18] | YOST W T;CANTRELL J H .Materials characterization using acoustic nonlinearity parameters and harmonic generation[J].Rev QNDE,1990,9B:1669-1676. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%