王盛堯¹，胡緒騰¹，宋迎東^1,2
1（南京航空航天大學能源與動力學院江蘇省航空動力系統重點實驗室，江蘇 南京 210016）
²（南京航空航天大學機械結構力學及控制國家重點實驗室，江蘇南京 210016)

　　摘要：本文針對兩種高強度延性金屬材料1Cr11Ni2W2MoV不銹鋼和TC11鈦合金，進行了光滑圓棒、缺口圓棒以及缺口平板試件的室溫單拉實驗，獲得了材料靜拉伸的性能參數。基于Majima等人提出的預測延性材料U型缺口圓棒的缺口拉伸強度比的經驗公式，用缺口件的應力集中系數Kt和材料單拉性能參數對其進行修正，以適應更廣泛的缺口形狀。結果表明，修正后的公式能夠很好的預測兩種材料的缺口強度比，而且該經驗公式僅僅依賴于試件的缺口幾何尺寸以及材料的靜拉伸性能參數，應用比較簡單。
　　關鍵字：TC11鈦合金，不銹鋼， 缺口試樣，拉伸強度，缺口強度比

Wang Sheng-yao¹,  HU Xu-teng¹,  SONG Ying-dong^1,2
 

（1. NanjingUniversity of Aeronautics and Astronautics, JiangsuProvince Key Laboratory of Aerospace Power Systems, Nanjing 210016, China）

（2.State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China ）

　　Abstract: Aimed at the two high strength ductile metal materials of, 1Cr11Ni2W2MoV stainless steel and TC11 titanium alloy, we employed tensile tests of smooth cylindrical bar, notched cylindrical with U-shaped and V-shaped, and two kinds of notched plate with U-shaped specimens under room temperature, and obtained the two materials' uniaxial tensile properties parameters. Based on the empirical equation proposed by Majima to predict the value of the notch strength ratio of ductile materials, we correct it by the stress concentration factor Kt of the notched specimens and the uniaxial tensile properties parameters.The result indicates that the corrected empirical equation could predict the notch strength ratio accurately, and the equation just depends on the notch geometric dimension of the specimens and the uniaxial tensile properties parameters, and it could be used simply.
　　Key Words: TC11 titanium alloy, stainless steel , notch specimens,tensile strength,notch strength ratio
　　聯系方式
　　王盛堯：767976649@qq.com

責任編輯：趙澤南

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