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Title: The influence of grain size on the mechanical properties ofsteel

The influence of grain size on the mechanical properties ofsteel Many of the important mechanical properties of steel, including yield strength and hardness, the ductile-brittle transition temperature and susceptibility to environmental embrittlement can be improved by refining the grain size. The improvement can often be quantified in a constitutive relation that is an appropriate variant on the familiar Hall-Petch relation: the quantitative improvement in properties varies with d{sup -1/2}, where d is the grain size. Nonetheless, there is considerable uncertainty regarding the detailed mechanism of the grain size effect, and appropriate definition of ''grain size''. Each particular mechanism of strengthening and fracture suggests its own appropriate definition of the ''effective grain size'', and how it may be best controlled.
Authors:
Publication Date:
OSTI Identifier:861397
Report Number(s):LBNL--47875
R&D Project: 511201; TRN: US200601%%845
DOE Contract Number:DE-AC02-05CH11231
Resource Type:Technical Report
Data Type:
Research Org:Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org:USDOE Director, Office of Science. Office of Basic EnergySciences. Division of Materials Sciences
Country of Publication:United States
Language:English
Subject: 36 MATERIALS SCIENCE; DUCTILE-BRITTLE TRANSITIONS; EMBRITTLEMENT; FRACTURES; GRAIN SIZE; HARDNESS; MECHANICAL PROPERTIES; REFINING; STEELS; YIELD STRENGTH