Determination of Ratio of Yield Strength and Reduced Modulus during Cold Work Processing in 304 Austenitic Stainless Steel

Abstract:

304 austenitic stainless steel is a common structural material used in the nuclear power plant, and its basic mechanical property would be changed by work hardening, which seriously affects the evaluation of the integrity of the nuclear power structure. The relationships of between the yield strength and the reduced modulus ratio (σ_0.2/E_r) with the residual indentation depth and maximum depth ratio (h_r/h_m) during cold work processing of 304 austenitic stainless steel is analyzed by using theoretical analysis, experiment and finite element simulation, and an approximate analytical model to express σ_0.2/E_r by h_r/h_m is established in this paper. The investigating results indicate that yield strength, Vickers hardness, and σ_0.2/E_r will increase, and h_r/h_m decreases with the material deformation increasing, and the analytical result of the σ_0.2/E_r basically consistent with the experiment result.

• Periodical: Key Engineering Materials (Volume 795)
• Pages: 145-151
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.795.145
• Online since: March 2019
• Authors: Kai Li*, He Xue, Kuan Zhao, Shuai Wang, Ting Wang, Rui Han Song
• Keywords: 304 Austenitic Stainless Steel, Cold Working, Indentation Method, Work Hardening

References

[1] Z Zhang. Study on the effect of cold working on surface hardness and plastic mechanical parameters of nuclear power structure materials [D]. Xi'an University of Science and Technology, (2017).

[2] M H Liu. Research on mechanical problems in indentation hardness test[D]. Tianjin University, (2007).

[3] Z S Nie, X Q Tian, Y F Zhou, C L Zhou. Relationship between tensile strength and cold rolling hardness of 301 austenite stainless steel sheet[J].Journal of Iron and Steel Research,2012,24(04):22-27.

[4] Y Sun, D Zhang, L J Wu, et al. Analysis of the Influence of Material Residual Stress on Hardness Test[J]. Journal of East China University of Science and Technology, 2012, 38(5): 652-656.

[5] L Q Cai. Vickers Hardness Test and Analysis of Main Influencing Factors[J]. Physics Examination and Testing,2008(05):21-23.

[6] J L Song, Assessment of Measurement Uncertainty for Vickers Hardness Test of Metallic Materials[J].Shanxi Metallurgy,2017,40(06):127-128.

[7] X Y Zhou, Z D Jiang, H R Wang, Z Q Jiang. Analysis of Some Key Influencing Factors on Mechanical Properties of Membranes by Nanoindentation[J]. Mechanical Strength, 2007(05): 737-744.

[8] H Cui, H N Chen, J Chen, et al. Swelling Depression Behavior of Spheroidal Indentation and Its Effect on Hardness Measurement[J]. Chinese Journal of Materials Research, 2009, 23(1):54-58.

[9] H Xue, Z C Zhuang, T Cao, R Guo, Y H Cui, X Y Gong. Relationship between Vickers Hardness and Yield Stress of Structural Materials[J]. Journal of Xi'an University of Science and Technology, 2017, 37(02): 274-279.

[10] Z W Li, Y J Shen, Y F Ye. Comparative Analysis and Application of Hardness Test ASTM Standards and Domestic Standards[J].Physical Testing and Chemical Analysis Part A: Physical Testing,2017,53(06):391-395.

[11] L L Zhang, X Y Li. Vickers Hardness Test of Aluminum Alloy 7050-T7451 with Welds[C].The 20th Academic Annual Conference of Beijing Institute of Mechanics, 2014:2.

[12] H L Lee, J H Lee, Pharr G M. J Mech Phys Solids,2005,53:(2046).

[13] E.G Herbert, G M Pharr, W C Oliver, B N Lucas, J L Hay. Thin Solid Films, 2001, 331: 398-399.

DOI: 10.1016/s0040-6090(01)01439-0

[14] H P Jin, J G Chen. Calculation of elastic modulus and indentation hardness of materials based on energy method [J]. Mechanical Engineering Materials, 2013, 37(9): 84-89.

[15] Y L Liu. Simulation study on micro-nano scale indentation hardness testing [D]. Harbin Institute of Technology, (2010).

[16] M Dao, N Chollacoop, K J Van Vliet, T A Venkatesh, S Suresh. Computational modeling of the forward and reverse problems in instrumented sharp indentation, Acta Mater, 2001, 49: 3899.

DOI: 10.1016/s1359-6454(01)00295-6