GB/T 31967.2-2015Test method for physical property of rare earth permanent magnetic materials - Part 2: Determination of bending strength and fracture toughness (English PDF)
稀土永磁材料物理性能测试方法 第2部分：抗弯强度和断裂韧度的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
August 1, 2016
Scope
GB/T 31967.2-2015 is the English-translated version of 稀土永磁材料物理性能测试方法 第2部分：抗弯强度和断裂韧度的测定.
GB/T 31967.2-2015 is the Chinese standard "Test method for physical property of rare earth permanent magnetic materials - Part 2: Determination of bending strength and fracture toughness".
Its scope clause reads: This section provides a rare earth permanent magnet materials flexural strength (sigmabb) and fracture toughness (KIC) measurement method.
This section applies to brittle fracture rare earth permanent magnet materials, flexural strength and fracture toughness (KIC) measurement. Determination of flexural strength of Fan Wai.
20MPa ~ 2000MPa, fracture toughness (KIC) measurement range. 0.5MPa · m1/2 ~ 50MPa · m1/2. Its clauses include terms and definitions.
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Document preview — GB/T 31967.2-2015
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 14
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 3.1 Span
- 3.2 The maximum bending force
- 3.3 Flexural strength
- 3.4 The most vigorous themaximumforce
- 3.5 Fracture toughness
1 Scope
This section provides a rare earth permanent magnet materials flexural strength (sigmabb) and fracture toughness (KIC) measurement method.
This section applies to brittle fracture rare earth permanent magnet materials, flexural strength and fracture toughness (KIC) measurement. Determination of flexural strength of Fan
Wai. 20MPa ~ 2000MPa, fracture toughness (KIC) measurement range. 0.5MPa · m1/2 ~ 50MPa · m1/2.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
KIC fracture toughness test method GB/T 4161-2007 metallic material plane strain
Inspection and tension and (or) pressure testing machine force measuring system. GB/T 16825.1 of static uniaxial testing machines - Part 1 calibration
YB/T 5349 metal material bending mechanical performance test method
3 Terms and Definitions
GB/T 4161-2007, YB/T 5349 defined by the following terms and definitions apply to this document.
3.1 Span
Ls
Two samples from the bearing point bending test between devices, in millimeters (mm).
3.2 The maximum bending force
Fbb
Bending before specimen fracture can bear the greatest bending force in Newtons (N).
3.3 Flexural strength
sigmabb
Bending to break specimen, the maximum bending stress by elastic bending stress formula calculated in megapascals (MPa).
3.4 The most vigorous themaximumforce
Fmax
When the fracture toughness test before specimen fracture can withstand the most vigorous, kilo Newtons (kN).
3.5 Fracture toughness
KIC
Determination of the critical value of the stress intensity factor KI, MPa · m1/2. Where Roman numerals I, refers I crack and the crack in the top level […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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