Examination of cadmium-plated aircraft fasteners for hydrogen embrittlement Milton Levy, Gordon A. Bruggeman

Format:

• Book

Author/Creator:

• Bruggeman, Gordon A., author.
• Levy, Milton, author.

Contributor:

• ASTM International
• American Society for Testing and Materials
• American Society for Testing and Materials.

Language:

English

Subjects (All):

• Metals--Hydrogen embrittlement--Congresses.
• Metals--Testing--Congresses.
• Aircraft fasteners.
• Cadmium electroplate.
• Fracture.
• Steel, High strength.
• Hydrogen embrittlement.
• Mechanical properties.

Physical Description:

1 online resource (8 pages) illustrations, figures, tables

Place of Publication:

West Conshohocken, Pa. ASTM International 1988

Summary:

The Army Technology Materials Laboratory (AMTL) participated in a possible hydrogen embrittlement (HE) problem involving a variety of cadmium-plated AISI4340 steel fasteners used in OH-58 and CH-47 helicopters. These fasteners were being reworked at an Army depot where cadmium plating was carried out according to Federal Specification QQ-P-416C. A three-month period was considered suspect for cadmium-plated items processed at the depot, and AMTL was supplied with a number of fasteners (bolts), both new and reworked at the depot during the suspect period, for evaluation. These fasteners were sustained load tested for evidence of HE. All of the bolts provided by the depot survived at least 200 h of testing without cracking or fracture. Several of the bolts which were plated during the suspect period and which had passed HE relief tests were deliberately fractured for examination of failure mode. The fracture topography showed no evidence of HE effects. Hardness and cadmium plating thickness measurements were consistent with specification requirements

Notes:

• Includes bibliographical references and indexes
• Online resource; title from publisher's website, viewed December 19, 2016

Related Work:

American Society for Testing and Materials. Selected Technical Papers