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Cleaning and Cleanliness Measurement of Additive Manufactured PartsThe successful acquisition and utilization of piece parts and assemblies for contamination sensitive applications requires application of cleanliness acceptance criteria. Contamination can be classified using many different schemes. One common scheme is classification as organic, ionic and particulate contaminants. These may be present in and on the surface of solid components and assemblies or may be dispersed in various gaseous or liquid media. This discussion will focus on insoluble particle contamination on the surfaces of piece parts and assemblies. Cleanliness of parts can be controlled using two strategies, referred to as gross cleanliness and precision cleanliness. Under a gross cleanliness strategy acceptance is based on visual cleanliness. This approach introduces a number of concerns that render it unsuitable for controlling cleanliness of high technology products. Under the precision cleanliness strategy, subjective, visual assessment of cleanliness is replaced by objective measurement of cleanliness. When a precision cleanliness strategy is adopted there naturally arises the question: How clean is clean enough? The methods for establishing objective cleanliness acceptance limits will be discussed.
Document ID
20160008897
Acquisition Source
Marshall Space Flight Center
Document Type
Abstract
Authors
Mitchell, Mark A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Raley, Randy
(Jacobs Engineering and Science Services and Skills Augmentation Group (ESSSA) Huntsville, AL, United States)
Date Acquired
July 8, 2016
Publication Date
June 20, 2016
Subject Category
Space Processing
Report/Patent Number
M16-5038
Report Number: M16-5038
Meeting Information
Meeting: National Space & Missile Materials Symposium (NSMMS)
Location: Westminster, CO
Country: United States
Start Date: June 20, 2016
End Date: June 23, 2016
Sponsors: Department of Defense
Distribution Limits
Public
Copyright
Public Use Permitted.
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