连续球压痕法评价钢的塑性
Evaluating Plasticity of Steels through Continuous Ball Indentation Test
摘 要
对B16、Q345R、A106和2.25Cr1Mo四种钢进行了连续球压痕试验, 并按照所提出的方法对试验获得的载荷-位移曲线进行处理, 通过引入损伤积累理论获得连续球压痕试验的压痕塑性表征参数; 同时对四种钢进行了传统单轴拉伸试验以获得它们的断面收缩率, 将连续球压痕试验得到的压痕塑性表征参数与断面收缩率进行比较。结果表明: 对于断面收缩率大的钢, 其压痕塑性表征参数也较大; 在因试验条件限制而无法进行单轴拉伸试验时, 压痕塑性表征参数可以作为材料塑性评定的补充参数。
损伤
塑性
断面收缩率
ball indentation test
damage
plasticity
reduction of area
Abstract
Continuous ball indentation test was carried on B16, Q345R, A106 and 2.25Cr1Mo steels. The load-displacement curve obtained from test was processed with the method mentioned in this paper in order to get the indentation plastic characterization parameter by introducing damage accumulation theory. At the same time, the traditional uniaxial tensile tests were applied on the steels to get area reduction rate, and the comparison between the indentation plastic characterization parameter obtained from the continuous ball indentation test and the area reduction rate. The results show that the indentation plastic characterization parameter of the steels with better plasticity was higher. The plastic characterization parameter can be a supplement parameter when the uniaxial tensile test cannot be carried.
中图分类号 TH140.7 DOI 10.11973/jxgccl201609005
所属栏目 试验研究
基金项目
收稿日期 2015/6/15
修改稿日期 2016/6/15
网络出版日期
作者单位点击查看
备注关凯书(1962-),男, 黑龙江五常人, 教授, 博士。
引用该论文: GUAN Kai-shu,ZOU Bin,WU Sheng-bao. Evaluating Plasticity of Steels through Continuous Ball Indentation Test[J]. Materials for mechancial engineering, 2016, 40(9): 18～21
关凯书,邹 镔,伍声宝. 连续球压痕法评价钢的塑性[J]. 机械工程材料, 2016, 40(9): 18～21
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参考文献
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【2】AHN J H, KWON D. Derivation of plastic stress-strain relationship from ball indentations: examination of strain definition and pileup effect［J］. Journal of Materials Research, 2001, 16(11): 3170-3178.
【3】N′JOCK M Y, CHICOT D, DECOOPMAN X, et al. Mechanical tensile properties by spherical macroindentation using an indentation strain-hardening exponent［J］. International Journal of Mechanical Sciences, 2013, 75: 257-264.
【4】OLIVER W C, PHARR G M. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments［J］. Journal of Materials Research, 1992, 7(6): 1564-1583.
【5】OLIVER W C, PHARR G M. Measurement of hardness and elastic modulus by instrumented indentation: advances in understanding and refinements to methodology［J］. Journal of Materials Research, 2004,19(1): 3-20.
【6】KAN Q, YAN W, KANG G, et al. Oliver-Pharr indentation method in determining elastic moduli of shape memory alloys—a phase transformable material［J］. Journal of the Mechanics and Physics of Solids,2013,61(10): 2015-2033.
【7】GHOSH S, PRAKASH R V. Study of damage and fracture toughness due to influence of creep and fatigue of commercially pure copper by monotonic and cyclic indentation［J］. Metallurgical and Materials Transactions A, 2013, 44(1): 224-234.
【8】LEE J S, JANG J, LEE B W, et al. An instrumented indentation technique for estimating fracture toughness of ductile materials: a critical indentation energy model based on continuum damage mechanics［J］. Acta Materialia,2006,54(4):1101-1109.
【9】BYUN T S, KIM J W, HONG J H. A theoretical model for determination of fracture toughness of reactor pressure vessel steels in the transition region from automated ball indentation test［J］. Journal of Nuclear Materials, 1998, 252(3): 187-194.
【10】GHOSH S, TARAFDER M, SIVAPRASAD S, et al. Experimental and numerical study of ball indentation for evaluation of mechanical properties and fracture toughness of structural steel［J］. Transactions of the Indian Institute of Metals, 2010, 63(2/3): 617-622.
【11】GHOSH S, DAS G. Effect of pre-strain on the indentation fracture toughness of high strength low alloy steel by means of continuum damage mechanics［J］. Engineering Fracture Mechanics, 2012, 79: 126-137.
【12】GURSON A L. Continuum theory of ductile rupture by void nucleation and growth: part I-yield criteria and flow rules for porous ductile media［J］. Journal of Engineering Materials and Technology, 1977, 99(1): 2-15.
【13】ANDERSSON H. Analysis of a model for void growth and coalescence ahead of a moving crack tip［J］. Journal of the Mechanics and Physics of Solids, 1977, 25(3): 217-233.
【14】DYSKIN A V, SAHOURYEH E, JEWELL R J, et al. Influence of shape and locations of initial 3-D cracks on their growth in uniaxial compression［J］. Engineering Fracture Mechanics, 2003, 70(15): 2115-2136.
【15】NAHSHON K, HUTCHINSON J W. Modification of the Gurson model for shear failure［J］. European Journal of Mechanics A/Solids, 2008, 27: 1-17.
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