Self accommodation morphology of martensite variants in Zr-2. 5wt%Nb alloy

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90224-G· OSTI ID:5876937

Srivastava, D; Madangopal, K; Banerjee, S ^[1]; Ranganathan, S ^[2]

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1. Bhabha Atomic Research Center, Bombay (India). Metallurgy Division
2. Indian Inst. of Science, Bangalore (India). Dept. of Metallurgy

The role of self accommodation of the different martensite variants in controlling the morphologies of the Zr-2.5wt%Nb alloy martensite has been examined. Three distinct types of grouping of martensite variants have been found to be predominantly present. Crystallographic descriptions of these groups have been provided and the degrees of self accommodation for these have been estimated and compared with those corresponding to other possible variant groupings around the symmetry axes of the parent phase. The frequently observed 3-variant group, which shows an indentation mark morphology when viewed along < 111 >[sub [beta]] directions in the transmission electron microscope, has been seen to have the highest degree of self accommodation amongst the cases considered. Based on the observations made, a growth sequence leading to the formation of the final martensitic structure has been proposed.

• OSTI ID: 5876937
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 41:12; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
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IRON ALLOYS
MARTENSITE
MORPHOLOGY
NIOBIUM ALLOYS
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS