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US 10,328,532 B2Granted
Process mapping of average temperatures and process sensitivity
AssigneeCarnegie Mellon University
InventorJack Lee Beuth, Jr.
Life of this patent
Estimating the term…
Abstract
In one aspect, a method includes conducting a plurality of tests on process variables of a thermal process, with a test of the plurality of tests being conducted on two or more process variables, the test comprising: locally heating a region of a structure, wherein the local heating results in formation of a thermal field in the structure; assessing one or more temperature integrals of the thermal field; and based on results of the plurality of tests, generating a process map of the one or more temperature integrals of the thermal field, with the one or more temperature integrals based on a function of the two or more process variables.
Claims21
A method of controlling microstructural features in additive manufacturing, comprising:
- conducting a plurality of tests on process variables of a thermal process of an additive manufacturing process, with a test of the plurality of tests being conducted on two or more process variables, the test comprising:
- locally heating a region of a structure, wherein the local heating results in formation of a thermal field in the structure;
- and
- assessing one or more temperature integrals of the thermal field, at least one of the one or more temperature integrals being a function of a plurality of thermal measurements of a melt pool of the structure;
- based on results of the plurality of tests, generating a process map of the one or more temperature integrals of the thermal field, with the one or more temperature integrals based on a function of the two or more process variables;
- and
- controlling, in the additive manufacturing process, features in a region of an object by:
- determining, based on the process map, values for the process variables of the thermal process for causing a melt pool in the object to evaporate at a specific rate, the values being a function of the one or more temperature integrals of the thermal field;
- adjusting a heat in the region of the object based on the values that are determined for the process variables of the thermal process;
- and
- causing the melt pool in the object to evaporate at the specific rate.
8 more elements
A method of controlling microstructural features in additive manufacturing, comprising:
- conducting a plurality of tests on process variables of a thermal process of an additive manufacturing process, with a test of the plurality of tests being conducted on two or more process variables, the test comprising:
- locally heating a region of a structure, wherein the local heating results in formation of a thermal field in the structure;
- and
- assessing one or more thermal characteristics of the thermal field;
- based on results of the plurality of tests, generating a process map of the one or more thermal characteristics of the thermal field, with the one or more thermal characteristics based on a function of the two or more process variables;
- using the process map to determine a sensitivity of the one or more thermal characteristics to changes in values of the two or more process variables;
- and
- controlling, in the additive manufacturing process, features in a region of an object by:
- determining values for the process variables of the thermal process, the values being based on the sensitivity of the one or more thermal characteristics to changes in values of the two or more process variables;
- and
- adjusting, during the additive manufacturing process, heat of the object based on the values that are determined for the process variables of the thermal process to reduce fluctuations in the one or more thermal characteristics relative to fluctuations in the one or more thermal characteristics without adjusting the values of the process variables.
8 more elements
A method of controlling microstructural features in additive manufacturing, comprising:
- conducting a plurality of tests on process variables of a thermal process, with a test of the plurality of tests being conducted on two or more process variables, the test comprising:
- locally heating a region of a structure, wherein the local heating results in formation of a thermal field in the structure;
- and
- assessing one or more thermal characteristics of the thermal field;
- based on results of the plurality of tests, generating a process map of the one or more thermal characteristics of the thermal field, with the one or more thermal characteristics based on a function of the two or more variables;
- performing, based on the process map, differential geometry analysis to the thermal process;
- and
- controlling, in the additive manufacturing process, features in a region of an object by:
- determining values for the process variables of the thermal process, the values being based on the differential geometry analysis;
- and
- adjusting, during the additive manufacturing process, a heat of the object based on the values that are determined for the process variables of the thermal process to reduce fluctuations in the one or more thermal characteristics relative to fluctuations in the one or more thermal characteristics without adjusting the values of the process variable.
8 more elements
Dependencies are inferred from the claim text.