Determination of a life defining quantity

1. A method of determining a life defining quantity of a production component manufactured by an additive manufacturing process, the method comprising:

defining a plurality of components to be manufactured by an additive manufacturing process defined by a parameter set;

wherein the plurality of components comprises a first test piece and a first production component;

manufacturing the components in the same manufacturing batch using an additive manufacturing process and with nominally the same material composition,

determining a characteristic mechanical property of the first test piece; and

determining a value of a life defining quantity of the first production component as a function of the first test piece characteristic mechanical property,

providing the first production component with a first indicator and providing the first test piece with a second indicator, wherein the first indicator and the second indicator associate the first production component and first test piece respectively with the determined life defining quantity, the first test piece mechanical property and the additive manufacturing parameter set,

wherein for a further manufacturing batch of the plurality of components, at least one of: CAD model geometry of the manufacturing batch of the plurality of components; part numbers of the plurality of components; material powder composition; build parameters of a machine operable to execute the additive manufacturing process; and/or definition of manufacturing processes after completion of the additive manufacturing process; are determined in dependence of the determined mechanical property of the first test piece and determined value of the life defining quantity,

producing the further manufacturing batch of the plurality of components with the determined at least one of: CAD model geometry of the manufacturing batch of the plurality of components; part numbers of the plurality of components; material powder composition; build parameters of a machine operable to execute the additive manufacturing process; and/or

definition of manufacturing processes after completion of the additive manufacturing process.

2. The method as claimed in claim 1 , wherein the characteristic mechanical property is one of:

elasticity modulus; density; ultimate tensile strength; proof strength; low cycle fatigue strength; high fatigue strength; creep strength and/or ductility; oxidation resistance; or corrosion resistance.

3. The method as claimed in claim 1 , wherein the life defining quantity is indicative of an expected operational life and/or number of operational cycles of the first production component.

4. The method as claimed in claim 1 , wherein the additive manufacturing parameter set comprises at least one of a list of parameters related to the plurality of components, the list of parameters comprising: CAD model geometry reference of the manufacturing batch of the plurality of components; part numbers of the plurality of components; material powder composition used in the manufacture of the plurality of components; build parameters of a machine operable to execute the additive manufacturing process; and/or definition of manufacturing processes after completion of the additive manufacturing process.

5. The method as claimed in claim 1 , wherein the manufacturing batch is formed on a common build plate.

6. The method as claimed in claim 1 ,

wherein the plurality of components are manufactured in a three dimensional space defined by orthogonal axes x, y and z,

wherein the first test piece has a first longitudinal axis and the first test piece is formed such that its longitudinal axis is parallel to one of the x, y or z axes.

7. The method as claimed in claim 6 ,

wherein the plurality of components comprises a second test piece; and

wherein the second test piece has a second longitudinal axis and the second test piece is formed such that its second longitudinal axis is parallel to a different one of the axes x, y or z than the first longitudinal axis of the first test piece, and

wherein the method further comprises:

determining a characteristic mechanical property of the second test piece; and determining the value of a life defining quantity of the first production component as a function of the second test piece characteristic mechanical property.

8. The method as claimed in claim 7 ,

wherein the plurality of components comprises a third test piece; and

wherein the third test piece has a third longitudinal axis and the third test piece is formed such that its third longitudinal axis is parallel to a different one of the axes than the first longitudinal axis of the first test piece or second longitudinal axis of the second test piece, and

wherein the method further comprises:

determining a characteristic mechanical property of the third test piece; and

determining the value of a life defining quantity of the first production component as a function of the third test piece characteristic mechanical property.

9. The method as claimed in claim 1 ,

wherein the plurality of components comprises a second production component;

wherein the first production component is formed in a first orientation relative to the x, y or z axes;

wherein the second production component is formed the same orientation relative to the x, y or z axes as the first production component;

wherein the second production component is provided with a third indicator which associates the second production component with the determined life defining quantity and additive manufacturing parameter set.

10. The method as claimed in claim 1 , further comprising:

prior to determining the characteristic mechanical property of the first test piece, machining the first test piece to define a specimen of a predetermined geometry and size.

11. A method of manufacturing a plurality of components; the method comprising:

manufacturing the plurality of components in the same manufacturing batch using an additive manufacturing process and with nominally the same material composition, wherein the plurality of components comprises a first test piece and a first production component;

wherein the manufacturing batch is formed on a common build plate,

manufacturing the plurality of components in a three dimensional space defined by orthogonal axes x, y and z,

wherein the first test piece has a first longitudinal axis and the first test piece is formed such that its longitudinal axis is parallel to one of the x, y or z axes; and

wherein the first production component is formed in a first orientation relative to the x, y or z axes

wherein the plurality of components comprises a second test piece; and

wherein the second test piece has a second longitudinal axis and the second test piece is formed such that its second longitudinal axis is parallel to a different one of the axes x, y or z than the first longitudinal axis of the first test piece, and

wherein the method further comprises:

determining a characteristic mechanical property of the second test piece; and

determining the value of a life defining quantity of the first production component as a function of the second test piece characteristic mechanical property.