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FeMnAl合金热影响区液化裂纹评估

Heat affected zone liquation cracking evaluation on FeMnAl alloys.

作者信息

Giorjao Rafael, Riffel Kaue C, Brizes Eric, Sebeck Katherine, Ramirez Antonio J

机构信息

Welding Engineering, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA.

Department of Aerospace Materials, NASA John H Glenn Research Center, Cleveland, OH, USA.

出版信息

Sci Technol Adv Mater. 2024 Apr 19;25(1):2342232. doi: 10.1080/14686996.2024.2342232. eCollection 2024.

DOI:10.1080/14686996.2024.2342232
PMID:39104602
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11299437/
Abstract

FeMnAl steels are currently generating a lot of interest with potential applications for structural parts in armored vehicles due to their lower density and outstanding mechanical properties. Despite the extensive mechanical performance and heat treatment exploration of this alloy class, further weldability investigation is required for future large-scale deployment. In the present study, the liquation cracking of four heats of cast FeMnAl alloys was investigated by the spot-Varestraint technique. The study focuses primarily on the effect of the major elements of the FeMnAl system: C, Mn and Al. Optical and electron microscopy were employed to investigate the microstructural features, and CALPHAD was employed to aid the discussion regarding the alloy's composition differences and their effect on the liquation cracking susceptibility. The study was able to identify that compositions with the higher Mn, C, and lower Al presented the highest liquation cracking susceptibility. Conversely, composition presenting lower Mn, C, and Al showed the most resistant behavior. Furthermore, lower Al content promoted a fully-γ microstructure at low temperatures, which encouraged the appearance of longer cracks as a γ-matrix is more susceptible to HAZ cracking than a fully ferritic (α) or duplex (α + γ) microstructure.

摘要

FeMnAl钢由于其较低的密度和出色的机械性能，目前在装甲车辆结构部件的潜在应用方面引起了广泛关注。尽管对这类合金进行了广泛的力学性能和热处理研究，但为了未来的大规模应用，仍需要进一步研究其可焊性。在本研究中，采用斑点-可变拘束试验技术研究了四种铸造FeMnAl合金热料的液化裂纹。该研究主要关注FeMnAl体系主要元素：C、Mn和Al的影响。采用光学显微镜和电子显微镜研究微观结构特征，并利用CALPHAD辅助讨论合金成分差异及其对液化裂纹敏感性的影响。研究发现，Mn、C含量较高且Al含量较低的成分具有最高的液化裂纹敏感性。相反，Mn、C和Al含量较低的成分表现出最强的抗液化裂纹性能。此外，较低的Al含量在低温下促进了全γ组织的形成，这导致出现更长的裂纹，因为γ基体比全铁素体（α）或双相（α+γ）组织更容易发生热影响区裂纹。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/b724f6390311/TSTA_A_2342232_F0011_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/9309ba87e174/TSTA_A_2342232_UF0001_OC.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/6055c6c46fdd/TSTA_A_2342232_F0004_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/a6637997e15e/TSTA_A_2342232_F0005_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/12fd03c01e02/TSTA_A_2342232_F0006_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/0c92f09e35d3/TSTA_A_2342232_F0007_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/1779515891eb/TSTA_A_2342232_F0008_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/b28634399b7a/TSTA_A_2342232_F0009_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/f1d93a899be4/TSTA_A_2342232_F0010_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/b724f6390311/TSTA_A_2342232_F0011_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/9309ba87e174/TSTA_A_2342232_UF0001_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/62707c55a14c/TSTA_A_2342232_F0001_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/f4d4086a97d2/TSTA_A_2342232_F0002_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/7ddc987eb9d3/TSTA_A_2342232_F0003_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/6055c6c46fdd/TSTA_A_2342232_F0004_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/a6637997e15e/TSTA_A_2342232_F0005_B.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/12fd03c01e02/TSTA_A_2342232_F0006_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/0c92f09e35d3/TSTA_A_2342232_F0007_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/1779515891eb/TSTA_A_2342232_F0008_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/b28634399b7a/TSTA_A_2342232_F0009_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/f1d93a899be4/TSTA_A_2342232_F0010_OC.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/659d/11299437/b724f6390311/TSTA_A_2342232_F0011_OC.jpg

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本文引用的文献

1
Fe-Al-Mn-C lightweight structural alloys: a review on the microstructures and mechanical properties.铁铝锰碳轻质结构合金：微观结构与力学性能综述
Sci Technol Adv Mater. 2013 Mar 12;14(1):014205. doi: 10.1088/1468-6996/14/1/014205. eCollection 2013 Feb.