Title: Method and apparatus for the evaluation of a depth profile of thermo-mechanical properties of layered and graded materials and coatings

Abstract

A technique for determining properties such as Young's modulus, coefficient of thermal expansion, and residual stress of individual layers within a multi-layered sample is presented. The technique involves preparation of a series of samples, each including one additional layer relative to the preceding sample. By comparison of each sample to a preceding sample, properties of the topmost layer can be determined, and residual stress at any depth in each sample, resulting from deposition of the top layer, can be determined.

Inventors:

Finot, Marc ^[1]; Kesler, Olivera ^[2]; Suresh, Subra ^[3]

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+ Show Inventor Affiliations

1. Somerville, MA
2. Cambridge, MA
3. Wellesley, MA

Issue Date:

1998-01-01

Research Org.:

Idaho National Laboratory (INL), Idaho Falls, ID (United States)

OSTI Identifier:

872029

Patent Number(s):

5847283

Assignee:

Massachusetts Institute of Technology (Cambridge, MA)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B33 - ADDITIVE MANUFACTURING TECHNOLOGY B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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B - PERFORMING OPERATIONS B33 - ADDITIVE MANUFACTURING TECHNOLOGY B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

B33Y80/00 - Products made by additive manufacturing

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N3/20 - by applying steady bending forces

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DOE Contract Number:  

AC07-94ID13223

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

method; apparatus; evaluation; depth; profile; thermo-mechanical; properties; layered; graded; materials; coatings; technique; determining; modulus; coefficient; thermal; expansion; residual; stress; individual; layers; multi-layered; sample; involves; preparation; series; samples; including; additional; layer; relative; preceding; comparison; topmost; determined; resulting; deposition; top; individual layers; dual layer; top layer; thermal expansion; mechanical properties; residual stress; technique involves; graded materials; additional layer; determining properties; /73/