Details

Autor(en) / Beteiligte

• Ramachandran, Dileep Chandran
• Kim, Sung-Dae
• Moon, Joonoh
• Lee, Chang-Hoon
• Chung, Jun-Ho
• Biro, Elliot
• Park, Yeong-Do

Titel

Classification of martensite-austenite constituents according to its internal morphology in high-strength low alloy steel

Ist Teil von

• Materials letters, 2020-11, Vol.278, p.128422, Article 128422

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

ScienceDirect

Beschreibungen/Notizen

• [Display omitted] •M-A constituents are characterized according to its internal morphologies.•Blocky M-A constituents are all with a type 3 internal morphologies (random).•Slender M-A constituents are all with a type 2 internal morphologies (lath like).•Type 3 M-A constituents are most likely detrimental to fracture toughness. A novel internal morphology of martensite-austenite (M-A) constituent in the intercritically-reheated coarse-grained heat-affected zone of an HSLA steel was systematically studied. Previously identified morphologies of M-A were observed on prior austenitic grain boundaries (blocky M-A) with a cored and lath morphologies (Type 1 and 2, respectively), and lath boundaries (slender M-A) with a lath morphology (Type 2). However, this work identified a new morphology, which is with a random arrangement of substructures (Type 3). Due to highly chaotic morphology (more interfaces between substructures), type 3 M-A is more likely detrimental for toughness than the other two.