Correction of Detecting Method for Strain Hardening Exponent of Metallic Materials by Continuous Spherical Indentation Test

ZHANG Yuntao; DENG Xiaowei; WU Yiwen; YU Hongjie; YU Zhengyue

doi:10.11973/jxgccl202209012

Materials and Mechanical Engineering > 2022 > 46(9): 70-75. > DOI: 10.11973/jxgccl202209012

ZHANG Yuntao, DENG Xiaowei, WU Yiwen, YU Hongjie, YU Zhengyue. Correction of Detecting Method for Strain Hardening Exponent of Metallic Materials by Continuous Spherical Indentation Test[J]. Materials and Mechanical Engineering, 2022, 46(9): 70-75. DOI: 10.11973/jxgccl202209012

Citation:

PDF (857 KB)

Correction of Detecting Method for Strain Hardening Exponent of Metallic Materials by Continuous Spherical Indentation Test

1. State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Shanghai Customs Industrial Products and Raw Material Testing Technology Center, Shanghai 200135, China

More Information

Received Date: June 01, 2022
Revised Date: July 21, 2022

Graphical Abstract

Abstract

Abstract

Indentation load-depth curves of metallic materials were obtained by continuous spherical indentation tests. The curves were transformed into the representative stress-strain data by calculation, and then the data was fitted to obtain the strain hardening exponent n. The detecting method for n values by continuous spherical indentation tests was corrected by using the material plastic expansion index to determine the complete plastic deformation interval of the material, using the iterative algorithm to correct the plastic constraint factor, and considering the indentation accumulation effect to obtain the true contact depth. The correction method was used to calculate n values of eight materials including 6061 aluminum alloy, 6063 aluminum alloy, 45 steel, ST steel, AIF1 alloy, X52 steel, X60 steel and SK3 steel, and the obtained n values were compared with those by uniaxial tensile tests. The results show that the relative errors between the n values obtained by the uncorrected method and the tensile tests were more than 10%. After correction by the three methods, the relative errors were reduced; all were reduced to less than 5% except the relative error of X60 steel, that was 8.6%.

FullText(HTML)

References (18)

References

[1]	伍声宝,徐彤,喻灿,等.采用球压痕法测16MnR钢的拉伸性能[J].机械工程材料,2015,39(1):82-85. WU S B,XU T,YU C,et al.Measuring tensile properties of 16MnR steel by ball indentation technology[J].Materials for Mechanical Engineering,2015,39(1):82-85.
[2]	KWON D, KIM J H, KWON O, et al. Structure assessment using instrumented indentation: Strength, toughness and residual stress[C]//International Pipeline Conference. [S.l.]:American Society of Mechanical Engineers, 2018, 51869: V001T03A010.
[3]	LUDWIGSON D C.Modified stress-strain relation for FCC metals and alloys[J].Metallurgical Transactions,1971,2(10):2825-2828.
[4]	SWIFT H W.Plastic instability under plane stress[J].Journal of the Mechanics and Physics of Solids,1952,1(1):1-18.
[5]	束德林.工程材料力学性能[M].2版.北京:机械工业出版社,2007. SHU D L.Mechanical properties of engineering materials[M].2nd ed. Beijing:China Machine Press,2007.
[6]	KANG S K,KIM Y C,KIM K H,et al.Extended expanding cavity model for measurement of flow properties using instrumented spherical indentation[J].International Journal of Plasticity,2013,49:1-15.
[7]	金桩,赵建平.微载荷连续球压痕法评价金属材料的屈服强度和应变硬化指数[J].机械工程材料,2018,42(1):72-77. JIN Z,ZHAO J P.Yield strength and strain hardening exponent of metal material evaluated by micro-load continuous ball indentation method[J].Materials for Mechanical Engineering,2018,42(1):72-77.
[8]	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. GUAN K S,ZOU B,WU S B.Evaluating plasticity of steels through continuous ball indentation test[J].Materials for Mechanical Engineering,2016,40(9):18-21.
[9]	HOLLOMON J H.Tensile deformation[J].Transaction of American Institute of Mining, Metallurgical, and Petroleum Engineers,1945,12(4):1-22.
[10]	瞿力铮. 连续球压痕法金属材料拉伸性能试验和仿真研究[D].上海:上海交通大学,2019. QU L Z. Experimental and simulation study on tensile properties of metallic materials characterized by continuous ball indentation[D]. Shanghai:Shanghai Jiao Tong University,2019.
[11]	瞿力铮,吴益文,单清群,等.连续球压痕法表征幂硬化金属材料拉伸性能的有限元模拟[J].机械工程材料,2019,43(11):47-52. QU L Z,WU Y W,SHAN Q Q,et al.Finite element simulation of tensile properties of power law hardening metal materials evaluated by continuous ball indentation technique[J].Materials for Mechanical Engineering,2019,43(11):47-52.
[12]	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.
[13]	KIM J Y,LEE K W,LEE J S,et al.Determination of tensile properties by instrumented indentation technique:Representative stress and strain approach[J].Surface and Coatings Technology,2006,201(7):4278-4283.
[14]	TALIAT B, ZACHARIA T, KOSEL F. New analytical procedure to determine stress-strain curve from spherical indentation data[J]. International Journal of Solids and Structures, 1998, 35(33): 4411-4426.
[15]	MATTHEWS J R.Indentation hardness and hot pressing[J].Acta Metallurgica,1980,28(3):311-318.
[16]	DIETER G E, BACON D J. Mechanical metallurgy[M]. New York: McGraw-Hill, 1976.
[17]	崔航,陈怀宁,陈静,等.球形压痕法评价材料屈服强度和应变硬化指数的有限元分析[J].金属学报,2009,45(2):189-194. CUI H,CHEN H N,CHEN J,et al.FEA of evaluating material yield strength and strain hardening exponent using a spherical indentation[J].Acta Metallurgica Sinica,2009,45(2):189-194.
[18]	KIM S H,LEE B W,CHOI Y,et al.Quantitative determination of contact depth during spherical indentation of metallic materials:A FEM study[J].Materials Science and Engineering:A,2006,415(1/2):59-65.

Cited By

Get Citation

PDF

XML

Article views (4) PDF downloads (2)

Turn off MathJax

Article Contents

Abstract

References

Correction of Detecting Method for Strain Hardening Exponent of Metallic Materials by Continuous Spherical Indentation Test

Abstract

References

Catalog

Export File

Citation

Format

Content