Improved mechanical properties and hydrogen environment assisted cracking resistance of a secondary hardening ultra-high strength steel via double aging treatment
Source abstract
Abstract
Mechanical properties and hydrogen environment assisted cracking (HEAC) resistance of AerMet 100 steel after single and double aging treatments were investigated. The fracture toughness increased by 10 –25 % after double aging treatment due to the higher faction of reversed austenite. Stronger hydrogen traps formed after double aging treatment decreased hydrogen diffusion rates. The double aging treatment increased the K TH by 20–60 % while lowered the d a/d t II by 25–70 %. The improvement of HEAC resistance was related to the suppressed hydrogen diffusion and partitioning to the crack tip by carbides and reversed austenite, along with the enhanced austenite stability by Ni enrichment.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Microstructure and Mechanical Properties of Steels · Material Properties and Failure Mechanisms
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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