Material Testing
Fracture Toughness Tests
Fracture Toughness Tests
For fracture toughness testing of materials and structural soundness estimation, JFE-TEC possesses state-of-the-art technologies based on fracture mechanics, and provides testing, analysis and evaluation services.
We can also perform various types of tests to evaluate crack destruction of materials in which cracks exist.
Outline of Tests
JFE-TEC can perform the following tests and evaluations.
| Class | Test name | |
|---|---|---|
| Small-scale fracture toughness test | Static crack initiation test | KIC(KC, KJC) tests JIC (JC) tests CTODtests |
| Dynamic crack initiation test | Dynamic KIC (KC, KJC) tests Dynamic CTOD test | |
| Crack arrest test | CCA test | |
| Large-scale fracture toughness test | Wide plate tensile test | |
| Large-scale drop weight test (drop weight tear test: DWTT) | DWTT test | |
| Structural soundness estimation | ||
Public Standards Applied to Tests and Examples of Tests
Tests are performed in accordance with the following public standards.
Small-scale fracture toughness tests - Static crack initiation tests -
| Test/evaluation technique | Applicable standards | Example of tests performed |
|---|---|---|
| KIC (KC, KJC) tests JIC (JC) tests CTOD tests |
ISO 12737, 12135 ASTM E399, E1820, E1290, etc. BS7448 Part 1, Part 2 WES1108, 1109 |
Steel plates for welded structures, High strength steel plates (up to HT980) , Steel plates for pressure vessels (general, nuclear power), Clad steel plates, 9% Ni steel plates, Steel plates for offshore structures, Extra-heavy steel plates for shipbuilding, High strength linepipe materials, Special materials (induction hardened materials, aluminum alloys, brass, etc.) |
Small-scale fracture toughness tests - Dynamic crack initiation tests -
| Test/evaluation technique | Applicable standards | Example of tests performed |
|---|---|---|
| Dynamic KIC (KC, KJC) tests Dynamic CTOD tests |
ASTM E399, E1820 BS7448 Part 3 |
Steel plates for welded structures, Steel plates for pressure vessels, Steel plates for naval use, High strength linepipe materials |
Small-scale fracture toughness tests - Crack arrest tests -
| Test/evaluation technique | Applicable standards | Example of tests performed |
|---|---|---|
| CCA test | ASTM E1221 | Steel plates for pressure vessels, Steel plates for shipbuilding |
Large-scale fracture toughness tests
| Test/evaluation technique | Applicable standards | Example of tests performed |
|---|---|---|
| Wide plate tensile test | WES steel grade authorization test method Materials from joint research with academic societies Related literature |
Extra-heavy steel plates for shipbuilding, 9%Ni steel plates |
Large-scale drop weight test
| Test/evaluation technique | Applicable standards | Example of tests performed |
|---|---|---|
| DWTT test | API RP 5L3 |
Structural Soundness Estimation
JFE-TEC performs commissioned structural soundness estimations in accordance with the following standards.
- ASME Boiler & Pressure Vessel Code Sec. XI Appendix A
- BS7910: Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures
- API RP579: Fitness for Service
- JSME S NA1: Codes for nuclear power generation facilities: Rules on fitness-for-service for nuclear power plants
- WES2805: Method of assessment for flaws in fusion welded joints with respect to brittle fracture and fatigue crack growth
- WES2808: Method of assessing brittle fracture in steel weldments subjected to large cyclic and dynamic strain
- HPIS Z 101: Assessment Procedure for Crack-Like Flaws in Pressure Equipment
