ISO 15732:2003 PDF

Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture toughness of monolithic ceramics at room temperature by single edge precracked beam (SEPB) method

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Title (English):

ISO 15732:2003

Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture toughness of monolithic ceramics at room temperature by single edge precracked beam (SEPB) method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 20
Publication date:: October 13, 2003
Edition:: ISO IS 15732 edition 1 version 1
ICS:: 81.060.30

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Description (English):

ISO 15732:2003 describes a test method for the determination of fracture toughness of monolithic ceramic materials at room temperature by the Single-Edge-Precracked-Beam (SEPB) method. This International Standard is intended for use with monolithic ceramics and whisker- or particulate-reinforced ceramics which are regarded as macroscopically homogeneous. It does not include continuous-fiber-reinforced ceramic composites. ISO 15732:2003 is for material development, material comparison, quality assurance, characterization, reliability and design data generation. Fracture toughness values determined with other test methods cannot be interchanged with KIpb as defined in this International Standard, and may not be interchangeable with each other.

Technical details

Technical committee: ISO/TC 206 - Fine ceramics
SKU: ISO 15732:2003

Abstract

Overview

ISO 15732:2003 specifies a standardized test method - the Single-Edge-Precracked-Beam (SEPB) method - for measuring the fracture toughness of monolithic and whisker- or particulate-reinforced ceramics at room temperature. The standard defines the SEPB fracture toughness value K_Ipb, the specimen geometry and preparation, precrack generation, bending test procedures, validity checks and calculation/reporting rules. It excludes continuous-fiber‑reinforced ceramic composites. Typical uses include material development, comparison, quality assurance, characterization, reliability assessment and generation of design data.

Key topics and technical requirements

Test principle: Determine K_Ipb from precrack length, specimen dimensions and fracture load measured in three‑ or four‑point bending of a single‑edge precracked beam.
Precrack generation: A straight-through pop‑in precrack is induced by bridge loading of a Vickers (or Knoop) indent or from a saw notch. Annex A gives a typical bridge compression fixture design.
Apparatus and fixtures:
- Bridge compression precracking fixture (loading plate, ball seat, anvil with central groove).
- Bend test fixtures for three‑point or four‑point bending with free‑rolling pins to minimize friction.
- Testing machine with crosshead speed control; system rigidity ≥ 3 MN/m.
Measurement accuracy:
- Load accuracy ±1%; deflection measurement resolution and precision 0.001 mm.
- Dimensional measurements (width, thickness, precrack length) to 0.01 mm accuracy.
- Surface roughness Ra ≤ 0.2 µm (excluding ends).
Specimen geometry & preparation:
- Rectangular beam specimens with specified sizes (referred to as specimen I, II, III), chamfering 0.12 ± 0.03 mm at 45°.
- Minimum of five specimens per test series.
Validity and reporting: Clauses cover validity checks (pop‑in behavior, compliance change), calculation of K_Ipb, and required information in the test report.
Non‑interchangeability: K_Ipb values from ISO 15732 are not directly interchangeable with fracture toughness values from other test methods.

Applications and users

Who uses it: Materials engineers, ceramic manufacturers, R&D labs, accredited testing laboratories, quality assurance and reliability engineers.
Why use it:
- Generate reproducible fracture toughness data for advanced/technical ceramics.
- Compare materials or process batches, support design and life‑prediction, and validate material models.
- Establish QA acceptance criteria and support failure analysis.

Related standards

ISO 1101 - Geometrical tolerancing
ISO 3312 - Determination of Young’s modulus (sintered materials)
ISO 4287 - Surface texture (profile method)
ISO 6507-1 - Vickers hardness test

Keywords: ISO 15732, SEPB, Single-Edge-Precracked-Beam, fracture toughness, K_Ipb, monolithic ceramics, Vickers indent, three-point bending, four-point bending, advanced ceramics, test method.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Test principle: Determine K_Ipb from precrack length, specimen dimensions and fracture load measured in three‑ or four‑point bending of a single‑edge precracked beam.
Precrack generation: A straight-through pop‑in precrack is induced by bridge loading of a Vickers (or Knoop) indent or from a saw notch. Annex A gives a typical bridge compression fixture design.
Apparatus and fixtures:
- Bridge compression precracking fixture (loading plate, ball seat, anvil with central groove).
- Bend test fixtures for three‑point or four‑point bending with free‑rolling pins to minimize friction.
- Testing machine with crosshead speed control; system rigidity ≥ 3 MN/m.
Measurement accuracy:
- Load accuracy ±1%; deflection measurement resolution and precision 0.001 mm.
- Dimensional measurements (width, thickness, precrack length) to 0.01 mm accuracy.
- Surface roughness Ra ≤ 0.2 µm (excluding ends).
Specimen geometry & preparation:
- Rectangular beam specimens with specified sizes (referred to as specimen I, II, III), chamfering 0.12 ± 0.03 mm at 45°.
- Minimum of five specimens per test series.
Validity and reporting: Clauses cover validity checks (pop‑in behavior, compliance change), calculation of K_Ipb, and required information in the test report.
Non‑interchangeability: K_Ipb values from ISO 15732 are not directly interchangeable with fracture toughness values from other test methods.

Applications and users

Who uses it: Materials engineers, ceramic manufacturers, R&D labs, accredited testing laboratories, quality assurance and reliability engineers.
Why use it:
- Generate reproducible fracture toughness data for advanced/technical ceramics.
- Compare materials or process batches, support design and life‑prediction, and validate material models.
- Establish QA acceptance criteria and support failure analysis.

Related standards

ISO 1101 - Geometrical tolerancing
ISO 3312 - Determination of Young’s modulus (sintered materials)
ISO 4287 - Surface texture (profile method)
ISO 6507-1 - Vickers hardness test

Keywords: ISO 15732, SEPB, Single-Edge-Precracked-Beam, fracture toughness, K_Ipb, monolithic ceramics, Vickers indent, three-point bending, four-point bending, advanced ceramics, test method.

ISO 15732:2003 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for fracture toughness of monoli…

Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, locatio…

Sintered metal materials and hardmetals - Determination of Young modulus (ISO 3312:1987)

Surface roughness — Terminology — Part 2: Measurement of surface roughness parameters

Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2023)