Abstract：Based on the Hollomon relation, the corresponding relationship between the n value and the yield ratio was deduced. According to this formula, the value of n of one material with certain thickness was firstly measured, which was then substituted to obtain the value of material constant C. For the materials of this type of steel with other thicknesses, the measurement of yield strength Rp0.2 and tensile strength Rm was only required to calculate the value of n according to the formula. The calculation values and measurement values of n of typical material were compared. The results showed that the proposed method for the calculation of n was accurate and simple to use, which greatly simplified the work of determining the n value of the same steel type. This method was especially applicable for the estimation of n value of ultra-thin materials or ultra-thick materials, which was difficulty measured in the laboratory.
王飞龙, 覃荣光, 周三保, 尹晶晶, 靳阳. 金属板材应变硬化指数n与其屈强比的关系[J]. 物理测试, 2023, 41(1): 16-20.
WANG Feilong, QIN Rongguang, ZHOU Sanbao, YIN Jingjing, JIN Yang. Relationship between strain hardening index (n) of metal sheet and its yield ratio. PHYSICS EXAMINATION AND TESTING, 2023, 41(1): 16-20.
2023, Vol. 41 
