Search result: GB/T 24179-2023 (GB/T 24179-2009 Older version)
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Metallic materials - Residual stress determination - Indentation strain-gage method
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GB/T 24179-2023
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Metallic materials -- Residual stress determination -- The indentation strain-gage method
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| Standard ID | GB/T 24179-2023 (GB/T24179-2023) | | Description (Translated English) | Metallic materials - Residual stress determination - Indentation strain-gage method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H22 | | Classification of International Standard | 77.040.10 | | Word Count Estimation | 18,145 | | Date of Issue | 2023-08-06 | | Date of Implementation | 2024-03-01 | | Older Standard (superseded by this standard) | GB/T 24179-2009 | | Drafting Organization | Institute of Metal Research, Chinese Academy of Sciences, Dongguan Institute of Materials Genetics, Harbin Boiler Factory Co., Ltd., Wuhan Huatuo Measurement Technology Co., Ltd., Chinalco Materials Application Research Institute Co., Ltd., Guangdong Torch Testing Co., Ltd., Guangzhou Shipbuilding International Co., Ltd. , Zhongshan Quality Supervision and Inspection Institute of Guangdong Province, Wuhan Iron and Steel Co., Ltd., Metallurgical Industry Information Standards Research Institute | | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | | Proposing organization | China Iron and Steel Industry Association | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 24179-2023. Indentation strain method for determination of residual stress in metallic materials
ICS 77.040.10
CCSH22
National Standards of People's Republic of China
Replace GB/T 24179-2009
Indentation strain method for determination of residual stress in metal materials
Published on 2023-08-06
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
PrefaceⅠ
1 range 1
2 Normative reference documents 1
3 Terms and Definitions 1
4 Symbols and descriptions 1
5 Principle 2
6 Measuring equipment and materials 4
7 Measurement Step 5
8 Determination of stress calculation function 6
9 test report 7
Appendix A (normative) Stress calculation methods under different measurement conditions 9
Appendix B (informative) Calculation method for weld stress that does not match the strength of the base metal 12
Appendix C (informative) Numerical calibration method of strain function 13
Reference 14
Preface
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 24179-2009 "Indentation strain method for determination of residual stress in metallic materials" and is consistent with GB/T 24179-2009
In comparison, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Change the term "calibration coefficient" to "strain function" (see Chapter 3, Chapter 3 of the.2009 edition);
b) Some symbols and descriptions have been changed (see Chapter 4, Chapter 4 of the.2009 edition);
c) Changed the principle description (see Chapter 5, Chapter 5 of the.2009 edition);
d) Delete the description of the piecewise linear relationship formula (2) and delete the formula (3) (see Chapter 5 of the.2009 edition);
e) The 60Ω strain gauge resistance value has been deleted (see 6.2.1 of the.2009 edition);
f) Changed the requirements for film base thickness (see 6.2.1,.2009 version of 6.2.1);
g) The upper limit of the indenter diameter has been changed (see 6.2.3, 6.4.1 of the.2009 edition);
h) The normative reference to GB/T 230.2 has been deleted (see 6.4.1 of the.2009 edition);
i) Added specific provisions on the stress relief process of heat treatment of calibration test plates (see 8.2.1);
j) It is clear that at least 7 to 8 stress levels are used for calibration to obtain a more accurate strain function, and the maximum value during calibration is increased.
The applied stress should be less than the elastic limit of the material rather than the yield limit (see 8.3.3, 8.2.3 of the.2009 edition);
k) Changed the calibration procedure for non-principal stress directions (see 8.5, 8.4 of the.2009 edition);
l) "Models of strain gauges, strain gauges, and indentation generating equipment used" are added to the test report (see Chapter 9, Chapter 9 of the.2009 edition).
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by the China Iron and Steel Industry Association.
This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
This document was drafted by. Institute of Metal Research, Chinese Academy of Sciences, Dongguan Advanced Institute of Materials Genetics, Harbin Boiler Factory Co., Ltd.
Company, Wuhan Huatuo Measurement Technology Co., Ltd., Chinalco Materials Application Research Institute Co., Ltd., Guangdong Torch Testing Co., Ltd., Guangzhou Shipyard International Co., Ltd.
Co., Ltd., Zhongshan Quality Supervision and Inspection Institute of Guangdong Province, Wuhan Iron and Steel Co., Ltd., and Metallurgical Industry Information Standards Research Institute.
The main drafters of this document. Chen Jing, Chen Huaining, Li Ronfeng, Wang Shuo, Jiang Yunlu, Dong Li, Li Gan, Niu Guanmei, Huang Jiajian, Bin Yuanhong, Su Yuexiao,
Liu Dong, Wang Xuanguo, Song Wentao, Shen Lei, Zeng Zhibin, Wang Guangpei, Hou Huining.
This document was first published in.2009 and this is the first revision.
Indentation strain method for determination of residual stress in metal materials
1 Scope
This document specifies the basic principles, measuring equipment and materials, and measuring procedures for measuring residual stress on the surface of metallic materials using the indentation strain method.
Steps, determination of stress calculation function and test report.
This document is applicable to the determination of residual stress on the surface of various metal materials with a hardness not greater than 50HRC.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 231.2 Brinell hardness test of metallic materials Part 2.Inspection and calibration of hardness tester
JJG623 Calibration Regulations for Resistance Strain Gauges
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
strain increment strainincrement
Δε
After an indentation is made on the material surface, the strain changes induced by the residual stress field and the spherical indentation are superimposed on each other.
(output) quantity.
3.2
The relationship function between strain increment and elastic strain.
Note. It is related to the material being tested, the shape of the strain rosette, and the size of the spherical indentation. It can generally be obtained through calibration tests and is used for stress calculation. It can also be referred to as stress calculation.
function.
4 Symbols and descriptions
The symbols and descriptions used in this document are shown in Table 1.
Table 1 Symbols and descriptions
Symbol Description Unit
A0 strain increment under zero stress -
A0~A3 Coefficients of strain function-
E Elastic modulus GPa of the material being tested
......
GB/T 24179-2009
Metallic materials. Residual stress determination. The indentation strain-gage method
ICS 77.040.10
H22
National Standards of People's Republic of China
Metallic material residual stress determination indentation strain method
Posted 2009-06-25
2010-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
Appendix A of this standard is a normative appendix, Appendix B is an informative annex.
The standard proposed by China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee.
This standard was drafted. Institute of Metal Research, Wuhan Iron and Steel (Group) Corporation, Beijing University of Aeronautics and Astronautics.
The main drafters of this standard. Chen Huaining, IRON, Chen Jing, Huang Chunling, Li star.
Metallic material residual stress determination indentation strain method
1 Scope
This standard specifies the determination of the metal material surface residual stress-strain method using indentation terms and definitions, principle, measuring equipment, measuring step
Step, calibration coefficient determination test reports.
This standard applies to the determination of not more than 50HRC hardness of various metal surface residual stress.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 228 metal materials at room temperature tensile test method
GB/T 230.2 Metallic Rockwell hardness test - Part 2. hardness (A, B, C, D, E, F, G, H, K, N, T scale) test
And Calibration
GB/T 231.2 Brinell hardness test - Part 2. Verification and calibration of hardness
GB/T 7314 Compression testing of metallic materials at room temperature
JJG623 resistance strain gauge test procedures
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
△ ε
After the surface indentation by a spherical indentation and residual stress field induced strain changes common superposition of strain produced after change
Of (output) volume.
3.2
A, B
In the indentation strain measurement of residual stress in the material being tested, rosette shape, spherical indentation about the size, and the elastic strain increment Contact
Relations constant strain.
4 Symbols and
Symbols and illustrate the criteria used in Table 1.
Table 1 Symbols and
Symbol Description Unit
△ ε strain increment
△ ε x0 x0 along the direction of the strain increment (or parallel to the seam along the principal stress directions)
Strain increment △ ε y along the y direction (or vertical seam along the main stress direction)
......
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