Accession Number : AD0684497

Title :   GRAIN BOUNDARY SEGREGATION OF IMPURITIES IN METALS AND INTERGRANULAR BRITTLE FRACTURE.

Descriptive Note : Technical rept.,

Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Low,John R. , Jr. ; Goodman,Stephen R. ; Smith,Craig L.

Report Date : 01 MAR 1969

Pagination or Media Count : 37

Abstract : The report discusses two investigations of temper embrittlement in low alloy quenched and tempered steel. Part I deals with additive effects of phosphorus and antimony as embrittling impurities in this type of grain-boundary embrittlement. Part II describes efforts to develop a method of determining the degree of segregation of alloys and impurities to grain-boundaries during temper embrittlement. The method under study involves neutron activation analysis of the etchant from etched intergranular fracture surfaces. (Author)

Descriptors :   (*STEEL, HEAT TREATMENT), GRAIN BOUNDARIES, DUCTILE BRITTLE TRANSITION, IMPACT TESTS, PHOSPHORUS ALLOYS, ANTIMONY ALLOYS, ETCHING, NEUTRON ACTIVATION, CHEMICAL ANALYSIS

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE