High Temperature Creep Properties of Reduced Activation Ferrite/Martensitic Steel Friction Stir Welded Joints

GAO Han; ZHOU Jiafen; LIANG Xudong; WANG Xiaohan; YIN Yuhuan; BAO Yunfeng; CUI Lei

doi:10.7512/j.issn.1001-2303.2023.03.12

Friction Stir Welding | Views : 0 下载量: 25 CSCD: 0

PDF
Export
Share
Collection
Album

High Temperature Creep Properties of Reduced Activation Ferrite/Martensitic Steel Friction Stir Welded Joints
Vol. 53, Issue 3, Pages: 101-110(2023)
DOI： 10.7512/j.issn.1001-2303.2023.03.12

扫描看全文

高焓，周佳芬，梁旭东，等.低活化铁素体/马氏体钢搅拌摩擦焊接头的高温蠕变性能［J］.电焊机，2023，53（3）：101-110.

GAO Han, ZHOU Jiafen, LIANG Xudong, et al.High Temperature Creep Properties of Reduced Activation Ferrite/Martensitic Steel Friction Stir Welded Joints[J].Electric Welding Machine, 2023, 53(3): 101-110.
高焓，周佳芬，梁旭东，等.低活化铁素体/马氏体钢搅拌摩擦焊接头的高温蠕变性能［J］.电焊机，2023，53（3）：101-110. DOI： 10.7512/j.issn.1001-2303.2023.03.12.

GAO Han, ZHOU Jiafen, LIANG Xudong, et al.High Temperature Creep Properties of Reduced Activation Ferrite/Martensitic Steel Friction Stir Welded Joints[J].Electric Welding Machine, 2023, 53(3): 101-110. DOI： 10.7512/j.issn.1001-2303.2023.03.12.

摘要

对5 mm厚度的低活化铁素体/马氏体钢（Reduced activation ferritic/martensitic steel，RAFM）进行了搅拌摩擦焊接，通过焊接接头的高温蠕变实验，研究低活化钢搅拌摩擦焊接头的高温蠕变性能与失效机理。结果表明，低活化钢搅拌摩擦焊接头高温力学性能良好。合金元素W和Ta含量高的RAFM钢的接头高温蠕变寿命更长，原因是Ta和W在高温环境中形成了更多的析出相，包括MX相和Laves相，对位错滑移的阻碍作用更强。650 ℃的蠕变寿命远远短于600 ℃的原因可能是，高温使得位错非常容易发生滑移，在Laves相还没有长大、MX相对位错滑移的阻碍作用不够强的情况下，在某些部位形成了密集的蠕变孔洞，造成有效横截面积急剧减少，应力集中严重，引发裂纹导致断裂。

Abstract

Friction stir welding (FSW) of Reduced activation ferritic/martensitic steel (RAFM) with a thickness of 5 mm was carried out. The high-temperature creep properties and failure mechanisms of FSW joints of were studied through high-temperature creep experiments. The results show that the mechanical properties of RAFM FSW joints are good at high temperature. The high temperature creep life of RAFM steel joints with high alloying elements W and Ta content is longer because Ta and W form more precipitated phases in high temperature environments, including MX and Laves phases, which have a stronger barrier effect on dislocation slip. The reason why the creep life at 650 ℃ is much shorter than that at 600 ℃ may be that high temperature make dislocations very prone to slip. When the Laves phase has not yet grown and the blocking effect of MX on dislocation slip is not strong enough, creep holes have been formed in some parts, resulting in a sharp reduction in the effective cross-sectional area, severe stress concentration, and initiation of cracks leading to fracture.

关键词

搅拌摩擦焊高温蠕变性能焊接接头低活化铁素体/马氏体钢

Keywords

friction stir weldinghigh temperature creep performancewelded jointsReduced activation ferritic/martensitic steel

references

Noh S， Ando M， Tanigawa H， et al. Friction stir welding of F82H steel for fusion applications［J］. Journal of Nuclear Materials， 2016， 478：1-6.

Poitevin Y， Aubert P， Diegele E， et al. Development of welding technologies for the manufacturing of European Tritium Breeder blanket modules［J］. Journal of Nuclear Materials， 2011， 417（1-3）：36-42.

Ku D Y， Oh S， Ahn M Y， et al. TIG and HIP joining of Reduced Activation Ferrite/Martensitic steel for the Korean ITER-TBM［J］. Journal of Nuclear Materials， 2011， 417（1-3）：67-71.

Krasnowski K， Sędek P， Łomozik M， et al. Impact of Selected FSW Process Parameters on Mechanical Properties of 6082-T6 Aluminium Alloy Butt Joints［J］. Archives of Metallurgy & Materials，2012，56（4）：965-973.

Mishra R S， De P S， Kumar N. Friction Stir Welding and Processing［M］. Springer International Publishing， 2014.

Ates H， Turker M， Kurt A. Effect of friction pressure on the properties of friction welded MA956 iron-based superalloy［J］. Materials & Design， 2007， 28（3）：948-953.

Hoelzer D T， Unocic K A， Sokolov M A， et al. Joining of 14YWT and F82H by friction stir welding［J］. Journal of Nuclear Materials， 2013， 442（1-3）： 529-534.

Noh S， Kasada R， Oono N， et al. Joining of ODS Steels and Tungsten for Fusion Applications［C］// Materials Science Forum， 2010：2891-2894.

Noh S， Kasada R， Kimura A， et al. Microstructure and mechanical properties of friction stir processed ODS ferritic steels［J］. Journal of Nuclear Materials， 2011， 417（1-3）：245-248.

Yabuuchi K， Tsuda N， Kimura A， et al. Effects of tool rotation speed on the mechanical properties and microstructure of friction stir welded ODS steel［J］. Materials Science & Engineering A， 2014， 595： 291-296.

Wang S S， Peng D L， Chang L， et al. Enhanced mechanical properties induced by refined heat treatment for 9Cr-0.5Mo-1.8W martensitic heat resistant steel［J］. Materials & Design， 2013， 50（17）： 174-180.

Kipelova A， Kaibyshev R， Belyakov A， et al. Microstructure evolution in a 3%Co modified P911 heat resistant steel under tempering and creep conditions［J］. Advanced Materials Research， 2011， 89-91：295-300.

Sawada K， Kubo K， Abe F. Creep behavior and stability of MX precipitates at high temperature in 9Cr-0.5Mo-1.8W-VNb steel［J］. Materials Science & Engineering A， 2001， 319-321：784-787.

董鹏. 6005A-T6铝合金搅拌摩擦焊接头的组织与性能研究［D］. 吉林：吉林大学， 2014.

DONG P. Study on Microstructures and Properties of Friction Stir Welding Joint of 6005A-T6 Aluminum Alloy［D］. Jilin： Jilin Universtiy，2014.

Hald J， Korcakova L. Precipitate Stability in Creep Resistant Ferritic Steels-Experimental Investigations and Modelling［J］. Transactions of the Iron & Steel Institute of Japan， 2003， 43（3）： 420-427

编辑部网址：http：//www.71dhj.comhttp://www.71dhj.com

Alert me when the article has been cited

提交

Design of a Three-dimensional Parallel Friction Stir Welding Head

X-ray Image Characteristics of 2219 Aluminum Alloy Friction Stir Welding Seams and Their Causes

Repair Process of Linear Defects on the Back of 2Al4 Aluminum Alloy FSW Weld

Vortex-Friction Stir Lap Welding of 5083 Aluminum Alloy/304 Stainless Steel Dissimilar Materials