Reduction in Defect Content in ODS Alloys

Ritherdon, J. ; Jones, A.R.

Oak Ridge National Laboratory

关键词: Intermetallic Compounds;    36 Materials Science;    Crystal Defects;    Iron Base Alloys;    Aluminium Alloys;   

DOI  :  10.2172/760252
RP-ID  :  ORNL/Sub/98-SY382/02
RP-ID  :  AC05-00OR22725
RP-ID  :  760252

美国|英语

来源: UNT Digital Library

【 摘 要 】

The work detailed within this report is a continuation of earlier work that was carried out under contract number IDX-SY382V. The earlier work comprised a literature review of the sources and types of defects found principally in Fe-based ODS alloys together with a series of experiments designed to identify defects in ODS Fe{sub 3}Al material and recommend methods of defect reduction. Defects found in the Mechanically Alloyed (MA) ODS Fe{sub 3}Al included regions of incomplete MA, porosity, intrusions and fine-grained stringers. Some defects tended to be found in association with one another e.g. intrusions and fine-grained stringers. Preliminary powder separation experiments were also performed. The scope and objectives of the present work were laid out in the technical proposal ``Reduction in Defect Content in ODS Alloys--II'' which formed the basis of amendment 3 of the current contract. The current studies were devised in the context of the preceding work with a view to extending and concluding certain experiments while exploring new avenues of investigation of defect control and reduction where appropriate. All work proposed was within the context of achieving an ODS Fe{sub 3}Al alloy of improved overall quality and potential creep performance (particularly) in the consolidated, release condition. The interim outturn of the experimental work performed is also reported.