Authors: Howard G Nelson Dell P Williams James E Stein
Publish Date: 1972/02/01
Volume: 3, Issue: 2, Pages: 473-479
Abstract
Environmental hydrogen embrittlement of a Ti6 Al4 V alloy has been studied as a function of test displacement rate and of variations inα β microstructure Embrittlement in low pres sure ∼1 atm gaseous hydrogen was inversely dependent on test displacement rate and strongly dependent on microstructure At a given displacement rate microstructures having a continuous αphase matrix were less severely embrittled than those having a continuous βphase matrix Further brittle fracture occurred in the former microstructures by transgranular cleavage and in the latter microstructures by intergranular separation These observations are consistent with previous studies made on slow strainrate embrittlement of hydrogencharged titanium alloys and are explained in terms of relative hydrogen transport rates within the αphase and βphase titanium
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