IT has been known for more than 10 years that titanium alloys suffer from intergranular stress corrosion cracking if they are in contact with chlorides at elevated temperatures (> 250° C), but it ...

That would mean a monthly 840,000 dollars for the M23 from the trade and transport of 120 tons of coltan in Rubaya.Before the M23 seized Rubaya, artisanal miners earned less than 3 dollars each a day.

Mining operations in eastern Democratic Republic of Congo. Image credit: Enough Project By Amani Matabaro Tom, Fellow and Scholar at Risk, Carr Center for Human Rights Policy, HKS; Founding Director, ...