Journal ArticleDOI
Correlation of Yield Strength and Tensile Strength with Hardness for Steels
Erik J. Pavlina,C.J. Van Tyne +1 more
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In this paper, the authors used regression analysis to determine the correlation of the yield strength and the tensile strength to the diamond pyramid hardness values for over 150 nonaustenitic, hypoeutectoid steels.Abstract:
Hardness values as well as yield and tensile strength values were compiled for over 150 nonaustenitic, hypoeutectoid steels having a wide range of compositions and a variety of microstructures. The microstructures include ferrite, pearlite, martensite, bainite, and complex multiphase structures. The yield strength of the steels ranged from approximately 300 MPa to over 1700 MPa. Tensile strength varied over the range of 450-2350 MPa. Regression analysis was used to determine the correlation of the yield strength and the tensile strength to the diamond pyramid hardness values for these steels. Both the yield strength and tensile strength of the steels exhibited a linear correlation with the hardness over the entire range of strength values. Empirical relationships are provided that enable the estimation of strength from a bulk hardness measurement. A weak effect of strain-hardening potential on the hardness-yield strength relationship was also observed.read more
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Dissertation
Characterisation and absolute quantification of nanosized V and Nb precipitates in high manganese steel using DualEELS
TL;DR: In this paper, a high-manganese steel with vanadium and niobium carbides or carbo-nitrides with various sizes from few to dozen of nanometers, but the average is less than 20nm.
Journal ArticleDOI
Determination of Mechanical Properties of M0 Copper Strips by Vickers and Brinell Hardness Values During Cold Rolling
Journal ArticleDOI
Developing 1000 MPa grade LCLA steels through continuous cooling: Effects of Cr and cooling rate on bainitic and martensitic transformations
TL;DR: In this paper , the effects of Cr addition and cooling rate on bainitic and martensitic transformations of 1000 MPa grade low carbon low alloy (LCLA) steels during continuous cooling were investigated, and the formation mechanism of C-rich martensite (CRM) was discussed.
Journal ArticleDOI
Autofrettage of weld clad components
G. Benghalia,James Wood +1 more
TL;DR: In this article, an autofrettage of an Inconel 625 thick-walled cylinder was investigated with modified residual stress distributions obtained indicating that tensile residual stresses throughout the clad layer are transformed to compressive in nature, discontinuity stresses at the clad/substrate interface are almost entirely eliminated and compressive residual stresses exist to a depth of around 18mm.
References
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Book
The Science of hardness testing and its research applications : based on papers presented at a symposium of the American Society for Metals, October 18 to 20, 1971
J. H. Westbrook,Hans Conrad +1 more
The determination of yield strength from hardness measurements
TL;DR: In this paper, it was shown that the 0.2 pct offset yield strength of a material can be obtained from simple hardness measurements using the expression σ y = (H/3)(0.1) m-2cffff, where H is the Diamond pyramid hardness and m is Meyer's hardness coefficient.
Journal ArticleDOI
Microhardness mapping and the hardness-yield strength relationship in high-pressure diecast magnesium alloy AZ91
Carlos H. Cáceres,J.R. Griffiths,J.R. Griffiths,Amirreza Pakdel,Cameron Davidson,Cameron Davidson +5 more
TL;DR: In this article, microhardness maps of cross-sections of high pressure diecast test bars of AZ91 have been determined, and the mean hardness obtained by integrating the micro hardness maps over the entire cross-section increased with decreasing thickness of the bars, and was found to be in good correlation with each bar's yield strength.
Journal ArticleDOI
On the correlation of mechanical and physical properties of 7075-T6 Al alloy
R. Clark,B. Coughran,I. Traina,A. Hernandez,T. Scheck,C. Etuk,J. Peters,E.W. Lee,J. Ogren,Omar S. Es-Said +9 more
TL;DR: In this paper, the influence of varying the thermal processing parameters on the physical and mechanical properties of 7075 T6 aluminum alloy was studied and an excellent correlation was found between the tensile strength and hardness.
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