Solidification cracking susceptibility of ferritic stainless steels using Modified Varestraint Transvarestraint (MVT) method

被引：2
|
作者：
Konadu, D. S. [1 ,2 ]
Pistorius, P. G. H. [1 ]
Du Toit, M. [3 ]
Griesche, Axel [4 ]
机构：
[1] Univ Pretoria, Dept Mat Sci & Met Engn, ZA-0002 Pretoria, South Africa
[2] Univ Ghana, Dept Mat Sci & Engn, POB LG 77, Accra, Ghana
[3] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW, Australia
[4] Fed Inst Mat Res & Testing, Bundesanstalt Materialforsch & Prufung BAM, Berlin, Germany
来源：
SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES | 2019年 / 44卷 / 09期
关键词：
Modified Varestraint Transvarestraint; solidification cracking; ferritic stainless steel; microstructure; welding; susceptibility;
D O I：
10.1007/s12046-019-1175-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Modified Varestraint Transvarestraint (MVT) test was used to investigate the solidification cracking susceptibility of an unstabilised, a Nb-stabilised and two (Ti + Nb) dual-stabilised ferritic stainless steels. Two different welding speeds of 6 and 3 mm/s using autogenous gas tungsten arc welding were employed. At the welding speed of 6 mm/s, the high-content (Ti + Nb) steel was resistant and the Nb-stabilised steel was marginally susceptible to solidification cracking. At the welding speed of 3 mm/s, the Nb and the high (Ti + Nb) steels were found to be marginally susceptible to solidification cracking while the unstabilised and low-content (Ti + Nb) grades were resistant to solidification cracking. The weld metal microstructures transverse to the welding direction revealed columnar grains in all the samples for both welding speeds. The ferritic stainless steels were generally resistant to solidification cracking, except the Nb-stabilised steel, which was marginally susceptible to solidification cracking.
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页数：6
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