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Meagan Chappell

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Indexed articles, last 90 days
3
Latest publication
Sep 25, 2026
Outlet visibility, for NASA Aeronautics
Top 50K sites
Earliest in this view
Jul 31, 2026

Latest articles

  1. Article · Sep 25, 2026 · Meagan Chappell

    TB 26-07 Aluminum Alloy 2219 Material Guidance - NASA (opens the original)

    Excerpt · English

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    For more information, contact Donald S. Parker, Kennedy Space Center, donald.s.parker@nasa.gov Improper casting and forging processes in the manufacture of aluminum alloy 2219 can lead to microstructural defects that result in a sub-optimal response to anodic surface treatments and an increase in corrosion susceptibility. This Technical Bulletin communicates the risks of improper casting and recommends a homogenizing step followed by multidirectional deformation after conventional direct chill c

  2. Article · Sep 23, 2026 · Meagan Chappell

    Risk of Hydrazine Use Following Freeze–Thaw Exposure - NASA (opens the original)

    Excerpt · English

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    For more information, contact Jonathan E. Jones, Langley Research Center, jonathan.e.jones@nasa.gov The purpose of this Technical Bulletin is to communicate the risks associated with freeze–thaw cycles in hydrazine monopropellant systems and to provide general recommendations for mitigating damage, operational hazards, and loss of system reliability in propulsion and auxiliary hydrazine systems. BackgroundHydrazine (N2H4) freezes near 1.6°C, and its phase transition is known to introduce risks t

  3. Article · Jul 31, 2026 · Meagan Chappell

    TB 26-05 Webbings for Use in Elevated Oxygen Environments - NASA (opens the original)

    Excerpt · Neutral tone · English

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    For more information, contact Kamili M. Shaw, Langley Research Center, kamili.j.shaw@nasa.gov Flammability test results for commercial-off-the-shelf webbings that meet NASA flammability requirements are reported for use in elevated oxygen environments anticipated for future lunar and Martian missions. Testing demonstrated that a webbing composed of 60% Kevlar®/40% polybenzimidazole (PBI) from Sturges Manufacturing Company, Inc., specifically the natural version, passed flammability testing per N

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