TY - JOUR
T1 - Microstructure and electrochemical behavior of stainless steel weld overlay cladding exposed to post weld heat treatment
AU - Cao, X. Y.
AU - Zhu, P.
AU - Liu, T. G.
AU - Lu, Y. H.
AU - Shoji, T.
N1 - Publisher Copyright:
© Materials Research Society 2017.
PY - 2017/2/28
Y1 - 2017/2/28
N2 - Microstructure and electrochemical behavior of stainless steel weld overlay cladding exposed to post weld heat treatment (PWHT) were investigated, wherein pitting and intergranular corrosion behaviors of the cladding material were evaluated by potentiodynamic polarization and double loop electrochemical potentiokinetic reactivation methods. The results indicated that inclusions, multiple element (Mn, Si, and Al) oxides distributed randomly in the cladding material with a size less than 1 μm. PWHT contributed to carbides precipitation along the δ/γ phase interface and the formation of Cr-depleted zone in the austenite phase. Inclusions acted as the pitting sites in the sample as welded. PWHT reduced the pitting potential and contributed to the formation of larger and deeper pits, which nucleated around the δ/γ phase interface primarily. Existence of carbides and Cr-depleted zone dominated the loss of intergranular corrosion resistance after PWHT.
AB - Microstructure and electrochemical behavior of stainless steel weld overlay cladding exposed to post weld heat treatment (PWHT) were investigated, wherein pitting and intergranular corrosion behaviors of the cladding material were evaluated by potentiodynamic polarization and double loop electrochemical potentiokinetic reactivation methods. The results indicated that inclusions, multiple element (Mn, Si, and Al) oxides distributed randomly in the cladding material with a size less than 1 μm. PWHT contributed to carbides precipitation along the δ/γ phase interface and the formation of Cr-depleted zone in the austenite phase. Inclusions acted as the pitting sites in the sample as welded. PWHT reduced the pitting potential and contributed to the formation of larger and deeper pits, which nucleated around the δ/γ phase interface primarily. Existence of carbides and Cr-depleted zone dominated the loss of intergranular corrosion resistance after PWHT.
UR - http://www.scopus.com/inward/record.url?scp=85011279011&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85011279011&partnerID=8YFLogxK
U2 - 10.1557/jmr.2016.526
DO - 10.1557/jmr.2016.526
M3 - Article
AN - SCOPUS:85011279011
VL - 32
SP - 852
EP - 862
JO - Journal of Materials Research
JF - Journal of Materials Research
SN - 0884-2914
IS - 4
ER -