Download or read book Examination of Cadmium Plated Aircraft Fasteners for Hydrogen Embrittlement written by Gordon A. Bruggeman and published by . This book was released on 1988 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Hydrogen Embrittlement written by Louis Raymond and published by ASTM International. This book was released on 1988 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Cadmium Plating on Aircraft Steels Under Stress Concentration at Elevated Temperatures written by E. M. Kennedy (Jr.) and published by . This book was released on 1961 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted of the effects of Cd plating on stressed steels at elevated temperatures. The experimental procedures involved several tests characterized as the stress-rupture, tensile, and fatigue tests. Materials studied consisted of several aircraft quality SAE steels; namely, 4340, 4130, 1095, 18-8, and H-13 hot work die steels. Strength levels from 180,000 to 300,000 psi, as suitable for the several steels, were evaluated for a variety of conditions of stress concentration. The steels examined, except the austenitic stainless steels, were susceptible to embrittlement by Cl plating at elevated temperatures. With decreasing temperatures, the noticeable effect of Cd plating on the properties of steels was correspondingly decreased. All the steels examined showing an effect on one property, showed similar effects on the other properties. (Author).

Download or read book NBS Technical Note written by and published by . This book was released on 1961 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA SP written by and published by . This book was released on 1988 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EVALUATION OF CADMIUM PLATING SYSTEMS FOR HYDROGEN EMBRITTLEMENT written by and published by . This book was released on 1962 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cooperative testing program to compare the hydrogen embrittlement characteristics of several available plating systems was conducted by ARTC project 6-61. Eleven plating systems that showed promise of being non- embrittling were selected for evaluation. The plating systems evaluated approached the problem of reduction of hydrogen entry and/or subsequent removal from steel by: (1) Porous deposits and subsequent baking to remove and/or distribute hydrogen absorbed; (2) High efficiency (low hydrogen producing bath) with subsequent baking; (3) Suppression of hydro gen formation by additives; (4) Organic baths with no hydrogen formation; and (5) Organo brush plating baths. The .003 in. notch root radius tensile specimen and the Douglas ring specimen evaluated in ARTC 13-59 were selected to test and evaluate the plating systems.

Download or read book Fastener Design Manual written by Richard T. Barrett and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Problems of Fatigue of Bolts and Bolted Joints in Aircraft Applications written by Leonard Mordfin and published by . This book was released on 1962 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corrosion Tests and Standards written by Robert Baboian and published by ASTM International. This book was released on 2005 with total page 887 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Processing Hydrogen Embrittlement of Cadmium Plated Artc Project 6 61 Notch Tensile Specimens Sustained Load Testing of written by W. M. Pratt and published by . This book was released on 1962 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Service Evaluation of Aircraft Experimental Fasteners written by W. C. Herron and published by . This book was released on 1967 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made of the degree of protection against corrosion provided to aircraft fasteners by high purity aluminum coatings versus the normal treatments - cadmium plating on steel and anodize on aluminum. Fasteners included aluminum and titanium rivets, titanium hi-loks, and steel lockbolts. Coating included cadmium plating, anodizing, aluminum (applied by two processes), zinc chromate primer (wet and encapsulated), and aircraft fuel tank sealant. The aircraft had been in service for approximately 24 months at the time of the final inspection. Three field inspections were conducted. The report contains the details of the third, and final, inspection, and also is the final summary technical report of the entire Phase II field service evaluation. Some of the results are very significant. Toward the primary purpose they showed conclusively that aluminum coatings protect steel fasteners and prevent damage to adjacent structure much more completely than conventional cadmium plating. Titanium fasteners also perform much better than cadmium plated steel fasteners. These results showed no significant trends as far as aluminum rivets are concerned. These results did show a very significant advantage for zinc chromate primer over fuel tank sealant in protecting cadmium plated steel fasteners and in preventing corrosion of the adjacent structure. Further, two important trends seemed to be indicated: encapsulated zinc chromate primer seems to be even more effective than normal wet applied zinc chromate primer, and titanium fasteners must be insulated from the adjacent aluminum structure to prevent galvanic corrosion which had begun to develop. (Author).

Download or read book Metals Abstracts written by and published by . This book was released on 1995 with total page 1602 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Failure Analysis of Engineering Structures written by V. Ramachandran and published by ASM International. This book was released on 2005 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Printbegrænsninger: Der kan printes 10 sider ad gangen og max. 40 sider pr. session

Download or read book Aerospace Environmental Technology Conference written by Ann F. Whitaker and published by . This book was released on 1995 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)