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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Effect of conventional and subzero treating on the mechanical properties of aged martensitic Fe-12 wt.% Ni-X wt.% Mn alloys
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Effect of conventional and subzero treating on the mechanical properties of aged martensitic Fe-12 wt.% Ni-X wt.% Mn alloys

机译：常规和零以下处理对时效马氏体Fe-12 wt。％Ni-X wt。％Mn合金力学性能的影响

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摘要

Fe-Ni-Mn maraging alloys are suffering from sever embrittlement after aging. Mechanism of the embrittelement has not been well understood yet. Segregation of Mn atoms or formation of Austenite particles at prior Austenite grain boundaries (PAGBs) have been reported as embrittelement mechanisms while it remains controversial now. For better understanding of embrittelement behavior, effect of subzero treating after aging, double aging and modification of alloy composition on the mechanical properties and fracture behavior were investigated. Alloys of chemical compositions Fe-11.9 wt.% Ni-6.3 wt.% Mn and Fe-10.5 wt.% Ni-5.8 wt.% Mo-3 wt.% Mn were studied. Double solution annealing was performed at 1223 and 1093 K for 3.6 ks followed by water quenching. After aging at 723 K for 0.9 ks (under aging) and 172.8 ks (over aging), tensile properties of specimens heat treated conventionally and cryogenically were measured. Double aging was done at 623 K for 3.6 ks followed by a step aging at 753, 783 and 803 K. Aging behavior and tensile properties of Fe-10.5 wt.% Ni-5.8 wt.% Mo-3 wt.% Mn were investigated after aging at 773 K. Results showed that alloy modification yields reasonable tensile properties while subzero treatment and double aging couldn't improve tensile properties. An insight toward more investigation of the embrittelement mechanism was made on the basis of this study.
机译：Fe-Ni-Mn马氏体时效合金遭受严重的脆化。填充的机制尚未被很好地理解。据报道，锰原子的偏析或在先前奥氏体晶界（PAGBs）处形成奥氏体颗粒是一种脆化机制，但目前仍存在争议。为了更好地了解其脆化行为，研究了时效，二次时效和合金成分改性对合金的力学性能和断裂行为的影响。研究了化学成分为Fe-11.9重量％的Ni-6.3重量％的Mn和Fe-10.5重量％的Ni-5.8重量％的Mo-3重量％的Mn的合金。在1223和1093 K下进行了3.6 ks的双固溶退火，然后进行水淬。在723 K下老化0.9 ks（老化后）和172.8 ks（老化）后，测量了常规和低温热处理的样品的拉伸性能。在623 K下进行了3.6 ks的双时效处理，然后在753、783和803 K上进行了一步时效。研究了Fe-10.5 wt。％Ni-5.8 wt。％Mo-3 wt。Mn的时效行为和拉伸性能在773 K时效后的结果。结果表明，合金改性产生了合理的拉伸性能，而零度以下处理和双重时效不能改善拉伸性能。在这项研究的基础上，提出了对更多研究絮凝机理的见解。

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