JIS-Z-2253-1996-ENG.pdf
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1、STD-JIS Z 2253-ENGL L77b m 4733b08 053b482 580 m UDC 620.173:539.37:669 J IS JAPANESE INDUSTRIAL STANDARD Method of determining the tensile strain hardening exponent for metallic sheet and strip JIS Z 2253-196 Translated and Published bY Japanese Standards Association Printed in Japan 5 s Copyright
2、Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 00:20:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STDOJIS Z 2253-ENGL L99b 4933b08 053b483 417 In the event of any dou
3、bt arising, the original Standard in Japanese is to be final authority . Errata for JIS (English edition) are printed in Standardization Journal, published monthly by the Japanese Standards Association. Errata will be provided upon request, please contact: Business Department, Japanese Standards Ass
4、ociation 4-1-24, Akasaka, Minato-ku, Tokyo, JAPAN 107 TEL. 03-3583-8002 FAX. 03-3583-0462 Errata are also provided to subscribers of JIS (English edition) in Monthly Infunnation. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wi
5、ng, Bernie Not for Resale, 03/11/2007 00:20:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STDmJIS Z 2253-ENGL 199b D 4933b08 053b1i81i 353 UDC 620.173:539.37:669 JAPANESE INDUSTRIAL STANDARD J I S Method of determining the tensile strain Z 2253-1996 hardening exponent
6、for metallic sheet and strip Introduction IS0 10275, Metallic materials - Sheet and strip - Determination of tensile strain hardening exponent, issued in 1993 as the first edition without changing the technical contents except those shown below: This Japanese Industrial Standard was made on the basi
7、s of Outline of difference of specified contents 0 Part of tensile test conditions is based on JIS Z 2241. Pair test method not specified in the corresponding International Standard is added to the methods of calculation. Rules for rounding off of numerical values. 1 . Scope mining the tensile strai
8、n hardening exponent for metallic sheet and strip by applying uniaxial tensile strain to them. This Japanese Industrial Standard specifies the method of deter- Remarks 1. The following standards are cited in this Standard: JIS B 7721 JIS B 7741 JIS G 0202 JIS Z 2201 JIS Z 2241 JIS Z 8401 Tensile tes
9、ting machines Extensometers used in metallic material tensile testing Glossary of terms used in iron and steel (testing) Test pieces for tensile test for metallic materials Method of tensile test for metallic materials Rules for rounding off of numerical values 2 . The following is the corresponding
10、 International Standard to this Standard: IS0 10275: 1993 Metallic materials-Sheet and strip- Determination of tensile strain hardening exponent 2. Definitions JIS G 0202 and the following definitions apply: For the purpose of this Standard, the definitions given in (i) testing force Force applied t
11、o test piece for the purpose of testing. (2) tensile strain hardening exponent The strain hardening exponent of n when making the relation between true stress and true strain approximate by the following equation (i) (hereafter referred to as n value). (1) o=K . En . Copyright Japanese Standards Ass
12、ociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 00:20:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STDoJIS Z 2253-ENGL 197b E 9733b08 053b485 29T 2 Z 2253-1996 The equation (i) can be trans
13、formed into a logarithmic equation (2) as ( 2 ) follows: lna= nlnb+ 1nK . . . . , . . . , . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The n value can be defined by the following equation as the gradient of the straight line in the
14、 logarithmic system of coordinates. n = tang where, a : gradient of line lna versus lne o : true stress in testing force F (N/mm2) E : true strain in testing force F L E = In- Le K : strength coefficient (N/mm2) F : testing force (N) Le : extensometer gauge length (mm) U : instantaneous elongation o
15、f measurement base (mm) L : instantaneous length of measurement base (mm) L = Le i- AL So : original cross-sectional area of parallel-sided section S : cross-sectional area of parallel-sided section of test of test piece (mm2) piece under testing force F (mm2) S=S- L, L 3. Principle of test prescrib
16、ed constant rate within the region of uniform plastic strain. The n value is calculated either by considering a portion of the stress-strain curve in the plastic strain region, or by considering the whole of the uniform plastic strain region. A test piece is subjected to uniaxial tensile strain at a
17、 Test equipment The test equipment shall be as follows: Testing machine of class 1 specified in JIS B 7721 or superior thereto. Extensometer of class 2 specified in JIS B 7741 or superior thereto. Dimension-measuring equipment capable of measuring the width and thickness of the parallel-sided sectio
18、n of the test piece to within the toler- ance of +2% or less on the original cross-sectional area measurement and $r0.2% or less on the width measurement shall be used. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie
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