Standard No.:	GB/T 7732-2008
Chinese Name:	金属材料 表面裂纹拉伸试样断裂韧度试验方法
English Name:	Metallic materials - Fracture toughness testing method with surface crack tension specimens
Professional Classification:	H22 Metal mechanical property test method
Professional Classification:	GB National Standard
ICS Classification:	77.040.10 Mechanical testing of metals
Issued by:
Issued on:	2008-05-13
Implemented on:	2008-11-01
Status:	VALID
Replace:	GB7732-1987 Standard test method for surface-crack fracture toughness Kle of metallie plates
Language:	English
File Format:	PDF
Word Count:	8000 words
Price(USD):	240 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This standard specifies the principle, terms, definitions and symbols, specimen, apparatus, procedures, result treatment and report for fracture toughness testing method under slowly and continuously increasing tensile load.

This standard is applicable to rectangular cross-section tension specimen made of metallic material, for which semielliptical or partial circular surface crack is available.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892: 1998)
GB/T 10623 Metallic Material - Mechanical Testing - Vocabulary (GB/T 10623-2008, ISO 23718: 2007, MOD)
GB/T 12160 Calibration of Extensometers Used in Uniaxial Testing (GB/T 12160-2002, ISO 9513: 1999, IDT)
GB/T 16825.1 Verification of Static Uniaxial Testing Machines - Part 1: Tension/Compression Testing Machines - Verification and Calibration of the Force-measuring System (GB/T 16825.1-2002, ISO 7500-1: 1999, IDT)
GB/T 20832 Metallic Materials - Designation of Test Specimen Axes in Relation to Product Texture (GB/T 20832-2007, ISO 3785: 2002, IDT)

3 Principle

This test is used for evaluating the bearing capacity of plates or plate-like structural parts with surface cracks during service. Where the service conditions are the same as experiment conditions, the result of surface crack tension testing may be directly used in design.

4 Terms, Definitions and Symbols

4.1 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 10623 and the following apply.